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Academic article
  • Gunnes, Nina; Gjessing, Håkon K.; Bakken, Inger Johanne Landsjøåsen; Ghaderi, Sara; Gran, Jon Michael; Hungnes, Olav; Magnus, Per; Samuelsen, Sven Ove; Skrondal, Anders; Stoltenberg, Camilla; Trogstad, Lill; Wilcox, Allen James; Håberg, Siri Eldevik. 2020. Seasonal and pandemic influenza during pregnancy and risk of fetal death: A Norwegian registry‑based cohort study. European Journal of Epidemiology (EJE). 9 pages.
  • Ding, Li; Blitz, Matthew J.; Wing, Deborah A.; Epstein, Aaron J.; Gjessing, Håkon K.; Wilson, Melissa L. 2020. PHLDA2 gene polymorphisms and risk of HELLP syndrome and severe preeclampsia. Pregnancy Hypertension. 190-194.
  • Gjerdevik, Miriam; Gjessing, Håkon K.; Romanowska, Julia; Haaland, Øystein Ariansen; Jugessur, Astanand; Czajkowski, Nikolai Olavi; Lie, Rolv T. 2020. Design efficiency in genetic association studies. Statistics in Medicine. 19 pages.
  • Lee, Yunsung; Choufani, Sanaa; Weksberg, Rosanna; Wilson, Samantha L.; Yuan, Victor; Burt, Amber; Marsit, Carmen; Lu, Ake T.; Ritz, Beate; Bohlin, Jon; Gjessing, Håkon K.; Harris, Jennifer Ruth; Magnus, Per; Binder, Alexandra M.; Robinson, Wendy P.; Jugessur, Astanand; Horvath, Steve. 2019. Placental epigenetic clocks: estimating gestational age using placental DNA methylation levels. Aging. 4238-4253.
  • Grønning Dale, Maria Teresa; Magnus, Per; Leirgul, Elisabeth; Holmstrøm, Henrik; Gjessing, Håkon K.; Brodwall, Kristoffer; Haugen, Margaretha; Stoltenberg, Camilla; Øyen, Nina. 2019. Intake of sucrose‑sweetened soft beverages during pregnancy and risk of congenital heart defects (CHD) in offspring: A Norwegian pregnancy cohort study. European Journal of Epidemiology (EJE). 383-396.
  • Gjerdevik, Miriam; Jugessur, Astanand; Haaland, Øystein Ariansen; Romanowska, Julia; Lie, Rolv T.; Cordell, Heather J.; Gjessing, Håkon K. 2019. Haplin power analysis: a software module for power and sample size calculations in genetic association analyses of family triads and unrelated controls. BMC Bioinformatics. 11 pages.
  • Kinge, Jonas Minet; Modalsli, Jørgen Heibø; Øverland, Simon Nygaard; Gjessing, Håkon K.; Tollånes, Mette Christophersen; Knudsen, Ann Kristin; Skirbekk, Vegard Fykse; Strand, Bjørn Heine; Håberg, Siri Eldevik; Vollset, Stein Emil. 2019. Association of Household Income with Life Expectancy and Cause-Specific Mortality in Norway, 2005-2015. Journal of the American Medical Association (JAMA). 1916-1925.
  • Haaland, Øystein Ariansen; Romanowska, Julia; Gjerdevik, Miriam; Lie, Rolv T.; Gjessing, Håkon K.; Jugessur, Astanand. 2019. A genome-wide scan of cleft lip triads identifies parent-of-origin interaction effects between ANK3 and maternal smoking, and between ARHGEF10 and alcohol consumption. F1000 Research. 28 pages.
  • Skare, Øivind; Lie, Rolv T.; Haaland, Øystein Ariansen; Gjerdevik, Miriam; Romanowska, Julia; Gjessing, Håkon K.; Jugessur, Astanand. 2018. Analysis of parent-of-origin effects on the X chromosome in asian and european orofacial cleft triads identifies associations with DMD, FGF13, EGFL6, and additional loci at Xp22.2. Frontiers in Genetics. 17 pages.
  • Haaland, Øystein Ariansen; Lie, Rolv T.; Romanowska, Julia; Gjerdevik, Miriam; Gjessing, Håkon K.; Jugessur, Astanand. 2018. A genome-wide search for gene-environment effects in isolated cleft lip with or without cleft palate triads points to an interaction between maternal periconceptional vitamin use and variants in ESRRG. Frontiers in Genetics. 16 pages.
  • McGinnis, Ralph; Steinthorsdottir, Valgerdur; Williams, Nicholas O.; Thorleifsson, Gudmar; Shooter, Scott; Hjartardóttir, Sigrún; Bumpstead, Suzannah; Stefánsdóttir, Lilja; Hildyard, Lucy; Sigurdsson, Jon K.; Kemp, John P.; Silva, Gabriela; Thomsen, Liv Cecilie Vestrheim; Jääskeläinen, Tiina; Kajantie, Eero; Chappell, Sally; Kalsheker, Noor; Moffett, Ashley; Hiby, Susan; Lee, Wai Kwong; Padmanabhan, Sandosh; Simpson, Nigel A.B.; Dolby, Vivien A.; Staines-Urias, Eleonora; Engel, Stephanie M.; Haugan, Anita; Trogstad, Lill; Svyatova, Gulnara; Zakhidova, Nodira; Najmutdinova, Dilbar; Dominiczak, Anna F.; Gjessing, Håkon K.; Casas, Juan P.; Dudbridge, Frank; Walker, James J.; Pipkin, Fiona Broughton; Thorsteinsdóttir, Unnur; Geirsson, Reynir Tõmas; Lawlor, Debbie A.; Iversen, Ann-Charlotte; Magnus, Per; Laivuori, Hannele; Stefánsson, Kári; Morgan, Linda. 2017. Variants in the fetal genome near FLT1 are associated with risk of preeclampsia. Nature Genetics. 1255-1260.
  • Pay, Aase Serine Devold; Frøen, Frederik; Staff, Anne Cathrine; Jacobsson, Bo; Gjessing, Håkon K. 2017. Symfyse-fundus-mål – prediktiv verdi av ny referansekurve. Tidsskrift for Den norske legeforening. 717-720.
  • Gjessing, Håkon K. 2017. Svangerskapsdatering. Norsk Epidemiologi. 13-18.
  • Gjerdevik, Miriam; Haaland, Øystein Ariansen; Romanowska, Julia; Lie, Rolv T.; Jugessur, Astanand; Gjessing, Håkon K. 2017. Parent-of-origin-environment interactions in case-parent triads with or without independent controls. Annals of Human Genetics. 60-73.
  • Clark, Michelle M.; Chazara, Olympe; Sobel, Eric M.; Gjessing, Håkon K.; Magnus, Per; Moffett, Ashley; Sinsheimer, Janet S. 2017. Human birth weight and reproductive immunology: testing for interactions between maternal and offspring KIR and HLA-C genes. Human Heredity. 181-193.
  • Haaland, Øystein Ariansen; Jugessur, Astanand; Gjerdevik, Miriam; Romanowska, Julia; Shi, Min; Beaty, Terri H.; Marazita, Mary L.; Murray, Jeffrey C.; Wilcox, Allen J.; Lie, Rolv T.; Gjessing, Håkon K. 2017. Genome-wide analysis of parent-of-origin interaction effects with environmental exposure (PoOxE): An application to European and Asian cleft palate trios. PLOS ONE. 19 pages.
  • Skare, Øivind; Gjessing, Håkon K.; Gjerdevik, Miriam; Haaland, Øystein Ariansen; Romanowska, Julia; Lie, Rolv T.; Jugessur, Astanand. 2017. A new approach to chromosome-wide analysis of X-linked markers identifies new associations in Asian and European case-parent triads of orofacial clefts. PLOS ONE. 23 pages.
  • Uribe, L M Moreno; Fomina, Tatiana; Munger, R G; Romitti, P A; Jenkins, M M; Gjessing, Håkon K.; Gjerdevik, Miriam; Christensen, Kaare; Wilcox, Allen James; Murray, Jeffrey C.; Lie, Rolv T.; Wehby, G L. 2017. A Population-Based Study of Effects of Genetic Loci on Orofacial Clefts. Journal of Dental Research. 1322-1329.
  • Andersen, Gidske Leknæs; Krzywinski, Knut; Gjessing, Håkon K.; Pierce, Richard. 2016. Seed viability and germination success of Acacia tortilis along land-use and aridity gradients in the Eastern Sahara. Ecology and Evolution. 256-266.
  • Pay, Aase Serine Devold; Frøen, Frederik; Staff, Anne Cathrine; Jacobsson, Bo; Gjessing, Håkon K. 2016. Prediction of small-for-gestational-age status by symphysis–fundus height: a registry-based population cohort study. BJOG: an International Journal of Obstetrics and Gynaecology. 1167-1173.
  • Bohlin, Jon; Håberg, Siri Eldevik; Magnus, Per; Reese, Sarah E; Gjessing, Håkon K.; Magnus, Maria Christine; Parr, Christine Louise; Page, Christian; London, Stephanie J; Nystad, Wenche. 2016. Prediction of gestational age based on genome-wide differentially methylated regions. Genome Biology. 9 pages.
  • Gjessing, Håkon K.; Grøttum, Per; Økland, Inger; Eik-Nes, Sturla. 2016. Fetal size monitoring and birth-weight prediction: a new population-based approach. Ultrasound in Obstetrics and Gynecology. 500-507.
  • Eggebø, Torbjørn Moe; Klefstad, Olav-Andre; Økland, Inger; Lindtjørn, Elsa; Eik-Nes, Sturla; Gjessing, Håkon K. 2016. Estimation of fetal weight in pregnancies past term. Acta Obstetricia et Gynecologica Scandinavica. 183-189.
  • Witsø, Elisabet; Cinek, Ondrej; Tapia, German; Brorsson, Caroline A.; Stene, Lars Christian; Gjessing, Håkon K.; Rasmussen, Trond; Bergholdt, Regine; Pociot, Flemming M; Rønningen, Kjersti Skjold. 2015. Genetic determinants of enterovirus infections: Polymorphisms in type 1 diabetes and innate immune genes in the MIDIA study. Viral immunology. 556-563.
  • Hiby, SE; Apps, R; Chazara, O; Farrell, LE; Magnus, Per; Trogstad, Lill; Gjessing, Håkon K.; Carrington, M; Moffett, A. 2014. Maternal KIR in combination with paternal HLA-C2 regulate human birth weight. Journal of Immunology. 5069-5073.
  • Farrel, Lydia E.; Hiby, Susan E.; Apps, Richard; Chazara, Olympe; Trogstad, Lill; Gjessing, Håkon K.; Magnus, Per; Carrington, Mary; Moffett, Ashley. 2014. KIR and HLA-C: Immunogenetic regulation of human birth weight. Norsk Epidemiologi. 107-110.
  • Myking, Solveig; Boyd, Heather A; Myhre, Ronny; Feenstra, Bjarke; Jugessur, Astanand; Pay, Aase Serine Devold; Østensen, Ingrid Helene Garmann; Morken, Nils-Halvdan; Busch, Tamara; Ryckman, Kelli K; Geller, Frank; Magnus, Per; Gjessing, Håkon K; Melbye, Mads; Jacobsson, Bo; Murray, Jeffrey C. 2013. X-chromosomal maternal and fetal SNPs and the risk of spontaneous preterm delivery in a Danish/Norwegian genome-wide association study. PLOS ONE. 11 pages.
  • Håberg, Siri Eldevik; Trogstad, Lill; Gunnes, Nina; Wilcox, AJ; Gjessing, Håkon K.; Samuelsen, Sven Ove; Skrondal, Anders; Cappelen, Inger; Engeland, Anders; Aavitsland, Preben; Madsen, Steinar; Buajordet, I; Furu, Kari; Nafstad, Per; Vollset, Stein Emil; Feiring, Berit; Nøkleby, Hanne; Magnus, Per; Stoltenberg, Camilla. 2013. Risk of Fetal Death after Pandemic Influenza Virus Infection or Vaccination. New England Journal of Medicine. 333-340.
  • Rietveld, Cornelius A.; Medland, SE; Derringer, J; Yang, J; Esko, T; Martin, NW; Westra, HJ; Shakhbazov, K; Abdellaoui, A; Agrawal, A; Albrecht, E; Alizadeh, BZ; Amin, N; Bamard, J; Baumeister, SE; Benke, KS; Bielak, LF; Boatman, JA; Boyle, PA; Davies, G; De Leeuw, C; Eklund, N; Evans, DS; Ferhmann, R; Fischer, K; Gieger, C; Gjessing, Håkon K.; Hagg, S; Harris, Jennifer; Hayward, C; Holzapfel, C; Ibrahim-Verbaas, CA; Ingelsson, E; Jacobsson, Bo; Joshi, PK; Jugessur, Astanand; Kaakinen, M; Kanoni, S; Karjalainen, J; Kolcic, I; Kristiansson, K; Kutalik, Z; Lahti, J; Lee, SH; Lin, P; Lind, PA; Liu, YM; Lohman, K; Loitfelder, M; McMahon, G; Vidal, PM; Meirelles, O; Milani, L; Myhre, Ronny; Nuotio, ML; Oldmeadow, CJ; Petrovic, KE; Peyrot, WJ; Polasek, O; Quaye, L; Reinmaa, E; Rice, JP; Rizzi, TS; Schmidt, H; Schmidt, R; Smith, AV; Smith, JA; Tanaka, T; Terracciano, A; van der Loos, MJHM; Vitart, V; Volzke, H; Wellmann, J; Yu, L; Zhao, W; Allik, J; Attia, JR; Bandinelli, S; Bastardot, F; Beauchamp, J; Bennett, DA; Berger, K; Bierut, LJ; Boomsma, DI; Bultmann, U; Campbell, H; Chabris, CF; Cherkas, L; Chung, MK; Cucca, F; de Andrade, M; De Jager, PL; De Neve, JE; Deary, IJ; Dedoussis, GV; Deloukas, P; Dimitriou, M; Eiriksdottir, G; Elderson, MF; Eriksson, JG. 2013. GWAS of 126,559 Individuals Identifies Genetic Variants Associated with Educational Attainment. Science. 1467-1471.
  • Hjellvik, Vidar; Selmer, Randi; Gjessing, Håkon K.; Tverdal, Aage; Vollset, Stein Emil. 2013. Body mass index, smoking, and risk of death between 40 and 70 years of age in a Norwegian cohort of 32,727 women and 33,475 men. European Journal of Epidemiology (EJE). 35-43.
  • Pay, Aase Serine Devold; Frøen, Frederik; Staff, Anne Cathrine; Jacobsson, Bo; Gjessing, Håkon K. 2013. A new population-based reference curve for symphysis-fundus height. Acta Obstetricia et Gynecologica Scandinavica. 925-933.
  • Jugessur, Astanand; Skare, Øivind; Lie, Rolv T.; Wilcox, Allen J; Christensen, Kaare; Christiansen, Lene; Nguyen, Trung-Truc; Murray, Jeffrey C; Gjessing, Håkon. 2012. X-Linked Genes and Risk of Orofacial Clefts: Evidence from Two Population-Based Studies in Scandinavia. PLOS ONE.
  • Jugessur, Astanand; Skare, Øivind; Harris, Jennifer; Lie, Rolv T.; Gjessing, Håkon K. 2012. Using offspring-parent triads to study complex traits : a tutorial based on orofacial clefts. Norsk Epidemiologi. 251-267.
  • Strand, Tor A; Sharma, Pushpa R; Gjessing, Håkon K.; Ulak, Manjeswori; Chandyo, Ram Krishna; Adhikari, Ramesh K; Sommerfelt, Halvor. 2012. Risk factors for extended duration of acute diarrhea in young children. PLOS ONE.
  • Igland, Jannicke; Vollset, Stein Emil; Nygård, Ottar; Gjessing, Håkon K.; Ueland, Per Magne; Tell, Grethe S. 2012. Relative importance of risk factors for coronary heart disease - The Hordaland Homocysteine Study. Scandinavian Cardiovascular Journal. 316-323.
  • Nilsen, Roy Miodini; Monsen, Anne Lise Bjørke; Midttun, Øivind; Nygård, Ottar; Pedersen, Eva Kristine Ringdal; Ulvik, Arve; Magnus, Per; Gjessing, Håkon; Vollset, Stein Emil; Ueland, Per Magne. 2012. Maternal tryptophan and kynurenine pathway metabolites and risk of preeclampsia. Obstetrics and Gynecology. 1243-1250.
  • Sommerfelt, Halvor; Steinsland, Hans; van der Merwe, Lize; Blackwelder, William C.; Nasrin, Dilruba; Faraq, Tamer H.; Kotloff, Karen L.; Levine, Myron M.; Gjessing, Håkon K. 2012. Case/Control studies with follow-up: constructing the source population to estimate effects of risk factors on development, disease, and survival. Clinical Infectious Diseases. s262-s270.
  • Jugessur, Astanand; Gjessing, Håkon K.; Wilcox, Allen J; Nguyen, Trung-Truc; Nilsen, Roy Miodini; Murray, Jeffrey C; Lie, Rolv T. 2012. Assessing the impact of nicotine dependence genes on the risk of facial clefts: An example of the use of national registry and biobank data. Norsk Epidemiologi. 241-250.
  • Skare, Øivind; Jugessur, Astanand; Lie, Rolv T.; Wilcox, Allen J; Murray, Jeffrey C; Lunde, Astrid; Nguyen, Trung-Truc; Gjessing, Håkon K. 2012. Application of a Novel Hybrid Study Design to Explore Gene-Environment Interactions in Orofacial Clefts. Annals of Human Genetics. 221-236.
  • Økland, Inger; Nakling, Ole Jakob; Gjessing, Håkon K.; Grøttum, Per; Eik-Nes, Sturla. 2012. Advantages of the population-based approach to pregnancy dating: results from 23 020 ultrasound examinations. Ultrasound in Obstetrics and Gynecology. 563-568.
  • Økland, Inger; Bjåstad, Tore; Johansen, Tonni Franke; Gjessing, Håkon; Grøttum, Per; Eik-Nes, Sturla. 2011. Narrowed beam width in newer ultrasound machines shortens measurements in the lateral direction: fetal measurement charts may be obsolete. Ultrasound in Obstetrics and Gynecology. 82-87.
  • Myhre, Ronny; Brantsæter, Anne Lise; Myking, Solveig; Gjessing, Håkon; Sengpiel, Verena; Meltzer, Helle Margrete; Haugen, Margaretha; Jacobsson, Bo Gunnar. 2011. Intake of probiotic food and risk of spontaneous preterm delivery. American Journal of Clinical Nutrition. 151-157.
  • Jugessur, Astanand; Shi, Min; Gjessing, Håkon; Lie, Rolv T.; Wilcox, Allen James; Weinberg, Clarice Ring; Christensen, Kaare; Boyles, Abee Lowman; Daack-Hirsch, Sandra; Nguyen, Trung-Truc; Christiansen, Lene; Lidral, Andrew Carl; Murray, Jeffrey Clark. 2011. Fetal genetic risk of isolated cleft lip only versus isolated cleft lip and palate: a subphenotype analysis using two population-based studies of orofacial clefts in Scandinavia. Birth defects research. Clinical and molecular teratology. 85-92.
  • Gervin, Kristina; Hammerø, Martin; Akselsen, Hanne Elisabeth; Moe, Rune; Nygård, Heidi; Brandt, Ingunn; Gjessing, Håkon; Harris, Jennifer; Undlien, Dag Erik; Lyle, Robert. 2011. Extensive variation and low heritability of DNA methylation identified in a twin study. Genome Research. 1813-1821.
  • Myking, Solveig; Myhre, Ronny; Gjessing, Håkon; Morken, Nils-halvdan; Sengpiel, Verena; Williams, Scott; Ryckman, Kelli K; Magnus, Per; Jacobsson, Bo. 2011. Candidate gene analysis of spontaneous preterm delivery: New insights from re-analysis of a case-control study using case-parent triads and control-mother dyads. BMC Medical Genetics.
  • Økland, Inger; Gjessing, Håkon; Grøttum, Per; Eggebø, Torbjørn Moe; Eik-Nes, Sturla. 2011. A new population-based term prediction model vs. two traditional sample-based models: validation on 9046 ultrasound examinations. Ultrasound in Obstetrics and Gynecology. 207-213.
  • Moger, Tron Anders; Haugen, Marion; Yip, Benjamin H. K.; Gjessing, Håkon; Borgan, Ørnulf. 2011. A hierarchical frailty model applied to two-generation melanoma data. Lifetime Data Analysis. 445-460.
  • Gjessing, Håkon K.; Røysland, Kjetil; Aalen, Odd O.; Pena, Edsel A. 2010. Recurrent events and the exploding Cox model. Lifetime Data Analysis. 525-546.
  • Jugessur, Astanand; Shi, Min; Gjessing, Håkon K.; Lie, Rolv Terje; Wilcox, Allen James; Weinberg, Clarice Ring; Christensen, Kaare; Boyles, Abee Lowman; Daack-Hirsch, Sandra; Nguyen, Trung-Truc; Christiansen, Lene; Lidral, Andrew Carl; Murray, Jeffrey Clark. 2010. Maternal genes and facial clefts in offspring: a comprehensive search for genetic associations in two population-based cleft studies from Scandinavia. PLOS ONE.
  • Vefring, Hege; Wee, Line L.; Jugessur, Astanand; Gjessing, Håkon K.; Nilsen, Stein Tore; Lie, Rolv T. 2010. Maternal angiotensinogen (AGT) haplotypes, fetal renin (REN) haplotypes and risk of preeclampsia; estimation of gene-gene interaction from family-triad data. BMC Medical Genetics. 7 pages.
  • Økland, Inger; Gjessing, Håkon; Grøttum, Per; Eik-Nes, Sturla. 2010. Biases of traditional term prediction models: results from different sample-based models evaluated on 41 343 ultrasound examinations. Ultrasound in Obstetrics and Gynecology. 728-734.
  • Magnus, Per; Brubakk, Oddbjørn; Nyland, Harald; Wold, Borgny Hedvig; Gjessing, Håkon K.; Brandt, Ingunn; Eidem, Tove; Nøkleby, Hanne; Stene-Larsen, Geir. 2009. Vaccination as teenagers against meningococcal disease and the risk of the chronic fatigue syndrome. Vaccine. 23-27.
  • Nilsen, Roy M; Vollset, Stein Emil; Gjessing, Håkon K.; Skjærven, Rolv; Klungsøyr, Kari; Schreuder, Patricia; Alsaker, Elin Hilde Roti; Haug, Kjell; Daltveit, Anne Kjersti Nesje; Magnus, Per. 2009. Self-selection and bias in a large prospective pregnancy cohort in Norway. Paediatric and Perinatal Epidemiology. 597-608.
  • Boyles, Abee L.; Wilcox, Allen J.; Taylor, Jack A. ; Shi, Min; Weinberg, Clarice R.; Meyer, Klaus; Fredriksen, Åse; Ueland, Per Magne; Johansen, Anne Marte W.; Drevon, Christian A; Juggessur, Astanand; Nguyen, Truc Trung; Gjessing, Håkon K; Vollset, Stein Emil; Murray, Jeffrey C.; Christensen, Kaare; Lie, Rolv T. 2009. Oral facial clefts and gene polymorphisms in metabolism of folate/one-carbon and vitamin A: a pathway-wide association study. Genetic Epidemiology. 247-255.
  • Jugessur, Astanand; Shi, Min; Gjessing, Håkon K; Lie, Rolv T.; Wilcox, Allen J; Weinberg, Clarice R; Christensen, Kaare; Boyles, Abee L; Daack-Hirsch, Sandra; Nguyen, Truc Trung; Bille, Camille; Lidral, Andrew Carl; Murray, Jeffrey Clark. 2009. Genetic determinants of facial clefting: analysis of 357 candidate genes using two national cleft studies from Scandinavia. PLOS ONE.
  • Lie, Rolv Terje; Wilcox, Allen J; Taylor, Jack; Gjessing, Håkon K.; Saugstad, Ola Didrik; Aabyholm, Frank; Vindenes, Halvard. 2008. Maternal smoking and oral clefts - The role of detoxification pathway genes. Epidemiology. 606-615.
  • Jugessur, Astanand; Rahimov, Fedik; Lie, Rolv Terje; Wilcox, Allen J; Gjessing, Håkon K.; Nilsen, Roy M; Nguyen, Trung-Truc; Murray, Jeffrey C. 2008. Genetic variants in IRF6 and the risk of facial clefts: Single-marker and haplotype-based analyses in a population-based case-control study of facial clefts in Norway. Genetic Epidemiology. 413-424.
  • Gjessing, Håkon K.; Lie, Rolv Terje. 2008. Biometrical modelling in genetics: are complex traits too complex? Statistical Methods in Medical Research. 75-96.
  • Rabe-Hesketh, Sophia; Skrondal, Anders; Gjessing, Håkon K. 2008. Biometrical modeling of twin and family data using standard mixed model software. Biometrics. 280-288.
  • Vollset, Stein Emil; Igland, Jannicke; Jenab, Mazda; Fredriksen, Åse; Meyer, Klaus; Eussen, Simone; Gjessing, Håkon K.; Ueland, Per Magne; Pera, Guillem; Sala, Núria; Agudo, Antonio; Capella, Gabriel; Del Giudice, Giuseppe; Palli, Domenico; Boeing, Heiner; Weikert, Cornelia; Bueno-de-Mesquita, H. Bas; Carneiro, Fátima; Pala, Valeria; Vineis, Paolo; Vineis, Valeria ; Tumino, Rosario; Panico, Salvatore; Berglund, Göran; Manjer, Jonas; Stenling, Roger; Hallmans, Göran; Martinez, Carmen; Dorronsoro, Miren; Barricarte, Aurelio; Navarro, Carmen; Quiros, José R.; Quirós, José R.; Allen, Naomi; Key, Timothy J.; Bingham, Sheila; Linseisen, Jakob; Kaaks, Rudolf; Overvad, Kim; Tjønneland, Anne; Tjønneland, Anne; Büchner, Frederike L.; Büchner, Frederike L.; Peeters, Petra H.M.; Numans, Mattijs E.; Clavel-Chapelon, Francoise; Boutron-Ruault, Marie-Christine; Trichopoulou, Antonia; Lund, Eiliv; Slimani, Nadia; Ferrari, Pietro; Riboli, Elio; Gonzalez, Carlos A. 2007. The association of gastric cancer risk with plasma folate, cobalamin, and Methylenetetrahydrofolate reductase polymorphisms in the European prospective investigation into cancer and nutrition. Cancer Epidemiology, Biomarkers and Prevention. 2416-2424.
  • Størksen, Ingunn; Røysamb, Espen; Gjessing, Håkon K; Moum, Torbjørn; Tambs, Kristian. 2007. Marriages and psychological distress among adult offspring of divorce: A Norwegian study. Scandinavian Journal of Psychology. 467-476.
  • Li, Huiling; Romieu, Isabelle; Wu, Hao; Sienra-Monge, Juan Jose; Ramirez-Aguilar, Matiana; del Rio-Navarro, Blanca Estela; del Lara-Sanchez, Irma Carmen; Kistner, Emily O; Gjessing, Håkon K.; London, Stephanie J. 2007. Genetic polymorphisms in transforming growth factor beta-1 (TGFB1) and childhood asthma and atopy. Human Genetics. 529-538.
  • Lunde, Astrid; Klungsøyr Melve, Kari; Gjessing, Håkon K.; Skjærven, Rolv; Irgens, Lorentz M. 2007. Genetic and environmental influences on birth weight, birth length, head circumference and gestational age using population based parent-offspring data. American Journal of Epidemiology. 734-741.
  • Strand, Tor A; Taneja, Sunita; Bhandari, Nita; Refsum, Helga; Ueland, Per Magne; Gjessing, Håkon K.; Bahl, Rajiv; Schneede, Joern; Bhan, Maharaj K; Sommerfelt, Halvor. 2007. Folate, but not vitamin B-12 status, predicts respiratory morbidity in north Indian children. American Journal of Clinical Nutrition. 139-144.
  • Gjessing, Håkon K.; Grottum, P; Eik-Nes, Sturla. 2007. A direct method for ultrasound prediction of day of delivery: a new, population-based approach. Ultrasound in Obstetrics and Gynecology. 19-27.
  • Vollset, Stein Emil; Tverdal, Aage; Gjessing, Håkon K. 2006. Smoking and deaths between 40 and 70 years of age in women and men. Annals of Internal Medicine. 381-389.
  • Gjesdal, Clara G.; Vollset, Stein Emil; Ueland, Per Magne; Refsum, Helga; Drevon, Christian; Gjessing, Håkon K.; Tell, Grethe S. 2006. Plasma total homocysteine level and bone mineral density - The Hordaland homocysteine study. Archives of Internal Medicine. 88-94.
  • Nilsen, Roy M; Vollset, Stein Emil; Gjessing, Håkon K.; Magnus, Per; Meltzer, Helle Margrete; Haugen, Alice Margaretha; Ueland, Per M. 2006. Patterns and predictors of folic acid supplement use among pregnant women: the Norwegian Mother and Child Cohort Study. American Journal of Clinical Nutrition. 1134-1141.
  • Dominicus, Annica; Skrondal, Anders; Gjessing, Håkon K.; Pedersen, Nancy L; Palmgren, Juni. 2006. Likelihood ratio tests in behavioral genetics: Problems and solutions. Behavior Genetics. 331-340.
  • Li, Huiling; Romieu, Isabelle; Sienra-Monge, Juan-Jose; Ramirez-Aguilar, Matiana; del Rio-Navarro, Blanca Estela; Kistner, Emily O; Gjessing, Håkon K.; Lara-Sanchez, Irma del Carmen; Chiu, Grace; London, Stephanie J. 2006. Genetic polymorphisms in arginase I and II and childhood asthma and atopy. Journal of Allergy and Clinical Immunology. 119-126.
  • Gjessing, Håkon K.; Lie, Rolv Terje. 2006. Case-parent triads: Estimating single- and double-dose effects of fetal and maternal disease gene haplotypes. Annals of Human Genetics. 382-396.
  • Vollset, Stein Emil; Gjessing, Håkon K; Tandberg, Anne; Rønning, Thorbjørn; Irgens, Lorentz; Baste, Valborg; Nilsen, Roy Miodini; Daltveit, Anne Kjersti. 2005. Folate supplementation and twin pregnancies. Epidemiology. 201-205.
  • Gjessing, Håkon K; Lie, Rolv Terje. 2005. Case-parent triads: Estimating single- and double-dose effects of fetal and maternal disease gene haplotypes. Annals of Human Genetics. 1-15.
  • Aalen, Odd Olai; Gjessing, Håkon K. 2004. Survival models based on the Ornstein-Uhlenbeck process. Lifetime Data Analysis. 407-423.
  • Steinsland, Hans; Valentiner-Branth, Palle; Gjessing, Håkon K; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2004. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. Ugeskrift for læger. 4051-4053.
  • Lie, Stein Atle; Engesæter, Lars B.; Havelin, Leif Ivar; Gjessing, Håkon K; Vollset, Stein Emil. 2004. Dependency issues in survival analyses of 55 782 primary hip replacements from 47 355 patients. Statistics in Medicine. 3227-3240.
  • Moger, Tron Anders; Aalen, Odd Olai; Heimdal, K; Gjessing, Håkon K. 2004. Analysis of testicular cancer data using a frailty model with familial dependence. Statistics in Medicine. 617-632.
  • Steinsland, Hans; Valentiner-Branth, Palle; Gjessing, Håkon K; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2003. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 286-291.
  • Steinsland, Hans; Valentiner-Branth, Palle; Gjessing, Håkon K; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2003. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 286-291.
  • Gjessing, Håkon K; Aalen, Odd Olai; Hjort, Nils Lid. 2003. Frailty models based on L{\'e}vy processes. Advances in Applied Probability. 532-550.
  • Aalen, Odd Olai; Gjessing, Håkon K. 2001. Understanding the shape of the hazard rate: a process point of view. Statistical Science. 1-22.
  • Block, H.W.; Savits, T.H.; Eberly, L.E.; Grambsch, P.; Connet, J.E.; Keiding, Niels; Aalen, Odd Olai; Gjessing, Håkon K. 2001. Understanding the shape of the hazard rate: A process point of view - Comments and rejoinder. Statistical Science. 14-22.
  • Strand, Tor A.; Briles, D.E.; Gjessing, Håkon K; Maage, Amund; Bahn, M.K.; Sommerfelt, Halvor. 2001. Pneumococcal pulmonary infection, septicaemia and survival in young zinc-depleted mice. British Journal of Nutrition. 301-306.
  • Magnus, Per; Gjessing, Håkon K; Skrondal, Anders; Skjærven, Rolv. 2001. Paternal contribution to birth weight. Journal of Epidemiology and Community Health. 873-877.
  • Vollset, Stein Emil; Refsum, Helga; Irgens, Lorentz; Emblem, BM; Tverdal, A; Gjessing, Håkon K; Monsen, Anne-Lise Bjørke; Ueland, Per Magne. 2000. Plasma total homocysteine, pregnancy complications, and adverse pregnancy outcomes: the Hordaland Homocysteine Study. American Journal of Clinical Nutrition. 962-968.
  • Vollset, Stein Emil; Refsum, Helge; Irgens, Lorentz M.; Emblem, B.M.; Tverdal, A.; Gjessing, Håkon K; Monsen, A.-L. Bjørke; Ueland, Per Magne. 2000. Plasma total homocysteine, pregnancy complications, and adverse pregnancy outcomes: the Hordaland Homocysteine Study. American Journal of Clinical Nutrition. 962-968.
  • Skjærven, Rolv; Gjessing, Håkon K; Bakketeig, Leif S. 2000. New standards for birth weight by gestational age using family data. American Journal of Obstetrics and Gynecology. 689-696.
  • Skjærven, Rolv; Gjessing, Håkon K; Bakketeig, LS. 2000. New standards for birth weight by gestational age using family data. American Journal of Obstetrics and Gynecology. 689-696.
  • Lie, Stein A; Engesæter, Lars B.; Havelin, Leif Ivar; Gjessing, Håkon K; Vollset, Stein Emil. 2000. Mortality after total hip replacement: 0-10-year follow-up of 39,543 patients in the Norwegian Arthroplasty Register. Acta Orthopaedica Scandinavica. 19-27.
  • Lie, S.A.; Engesæter, L.B.; Havelin, L.I.; Gjessing, Håkon K; Vollset, Stein Emil. 2000. Mortality after total hip replacement - 0-10-year follow-up of 39,543 patients in the Norwegian Arthroplasty Register. Acta Orthopaedica Scandinavica. 19-27.
  • Grewal, Harleen M. S.; Karlsen, Tom Hemming; Vetvik, Helene; Åhrén, Christina; Gjessing, Håkon K; Sommerfelt, Halvor; Haneberg, Bjørn. 2000. Measurement of specific IgA in faecal extracts and intestinal lavage fluid for monitoring of mucosal immune responses. JIM - Journal of Immunological Methods. 53-62.
  • Grewal, Harleen M. S.; Karlsen, Tom Hemming; Vetvik, H; Ahren, C; Gjessing, Håkon K; Sommerfelt, Halvor; Haneberg, B. 2000. Measurement of specific IgA in faecal extracts and intestinal lavage fluid for monitoring of mucosal immune responses. JIM - Journal of Immunological Methods. 53-62.
  • Grewal, Harleen M. S.; Karlsen, Tom Hemming; Vetvik, Helene; Ahrens, C.H.; Gjessing, Håkon K; Sommerfelt, Halvor; Haneberg, Bjørn. 2000. Measurement of specific IgA in faecal extracts and intestinal lavage fluid for monitoring of mucosal immune responses. JIM - Journal of Immunological Methods. 53-62.
  • Melve, K.K.; Gjessing, Håkon K; Skjærven, Rolv; Oyen, N. 2000. Infants' length at birth: an independent effect on perinatal mortality. Acta Obstetricia et Gynecologica Scandinavica. 459-464.
  • Melve, Kari Klungsøyr; Gjessing, Håkon K; Skjærven, Rolv; Øyen, Nina. 2000. Infant's length at birth: an independent effect on perinatal mortality. Acta Obstetricia et Gynecologica Scandinavica. 459-464.
  • Skjærven, Rolv; Gjessing, Håkon K; Bakketeig, LS. 2000. Birthweight by gestational age in Norway. Acta Obstetricia et Gynecologica Scandinavica. 440-449.
  • Skjærven, Rolv; Gjessing, Håkon K; Bakketeig, Leif S. 2000. Birthweight by gestational age in Norway. Acta Obstetricia et Gynecologica Scandinavica. 440-449.
  • Benth, Fred Espen; Gjessing, Håkon K. 2000. A nonlinear parabolic equation with noise. A reduction method. Potential Analysis. 385-401.
  • Benth, FE; Gjessing, Håkon K. 2000. A nonlinear parabolic equation with noise - A reduction method. Potential Analysis. 385-401.
  • Melve, Kari Klungsøyr.; Skjærven, Rolv; Gjessing, Håkon K.; Øyen, Nina. 1999. Recurrence of gestational age in sibships: Implications for perinatal mortality. American Journal of Epidemiology. 756-762.
  • Melve, K.K.; Skjærven, Rolv; Gjessing, Håkon K; Oyen, N. 1999. Recurrence of gestational age in sibships: Implications for perinatal mortality. American Journal of Epidemiology. 756-762.
  • Valentiner-Brandt, Palle; Steinsland, Hans; Gjessing, Håkon K; Santos, Gina; Bhan, Maharaj; Aaby, Peter; Sommerfelt, Halvor; Mølbak, Kåre. 1999. Community-based randomized controlled trial of reduced osmolarity oral rehydration solution in acute childhood diarrhea. Pediatr Infect Dis J. 789-795.
  • Lie, Rolv Terje; Rasmussen, S.; Brunborg, H.; Gjessing, Håkon; Lie-Nielsen, E.; Irgens, L. M. 1998. Fetal and maternal contributions to risk of pre-eclampsia: population based study. BMJ. British Medical Journal. 1343-1347.
  • Paulsen, Jostein; Gjessing, Håkon. 1997. Ruin theory with stochastic return on investments. Advances in Applied Probability. 965-985.
  • Paulsen, Jostein; Gjessing, Håkon. 1997. Ruin theory with stochastic return on investments. Advances in Applied Probability. 965-985.
  • Gjessing, Håkon; Paulsen, Jostein. 1997. Present value distributions with applications to ruin theory and stochastic equations. Stochastic Processes and their Applications. 123-144.
  • Gjessing, Håkon; Paulsen, Jostein. 1997. Present value distributions with applications to ruin theory and stochastic equations. Stochastic Processes and their Applications. 123-144.
  • Paulsen, Jostein; Gjessing, Håkon. 1997. Optimal choice of dividend barriers for a risk process with stochastic return on investments. Insurance, Mathematics & Economics. 215-223.
  • Paulsen, Jostein; Gjessing, Håkon. 1997. Optimal choice of dividend barriers for a risk process with stochastic return on investments. Insurance, Mathematics & Economics. 215-223.
  • Lie, Rolv Terje; Rasmussen, Svein; Brunborg, H.; Gjessing, Håkon; Lie-Nielsen, Erik; Irgens, Lorentz. 1997. Fetal and maternal contributions to risk of pre-eclampsia: population based study. BMJ. British Medical Journal. 1343-47.
  • Pierce, Richard; Gjessing, Håkon K. 1994. A stochastic model for the presence/absence of readings in Nidrstigningar Saga. World archaeology.
Report
  • Vollset, Stein Emil; selmer, randi; Tverdal, Aage; Gjessing, Håkon K. 2006. Hvor dødelig er røyking? Rapport om dødsfall og tapte leveår som skyldes røyking. .
  • Vollset, Stein Emil; Selmer, Randi Marie; Tverdal, Aage; Gjessing, Håkon K. 2006. Hvor dødelig er røyking? Rapport om dødsfall og tapte leveår som skyldes røyking. 2006:4. 2006:4. .
  • Gjessing, Håkon K. 1994. Integral conditions for Skorod stochastical differential equations. 24. 24. .
  • Gjessing, Håkon K. 1993. A note on the Wick product. Report No.23 March 1993. .
Popular scientific lecture
  • Gjessing, Håkon. 1997. Blødninger tidlig i svangerskapet; farligere enn tidligere antatt?
Academic lecture
  • Eggebø, Torbjørn Moe; Klefstad, Olav-Andre; Økland, Inger; Gjessing, Håkon K. 2016. Prenatal detection of macrosomia in pregnancies past term.
  • Eggebø, Torbjørn Moe; Klefstad, Olav-Andre; Økland, Inger; Gjessing, Håkon K. 2016. Prenatal detection of low birthweight in pregnancies past term.
  • Eggebø, Torbjørn Moe; Klefstad, Olav-Andre; Økland, Inger; Gjessing, Håkon K. 2016. Estimation of fetal weight in pregnancies past term.
  • Strand, Tor A; Taneja, Sunita; Bhandari, Nita; Bahl, Rajiv; Refsum, Helga; Gjessing, Håkon K; Ueland, Per Magne; Schneede, Jørn; Bhan, Maharaj K; Sommerfelt, Halvor. 2005. Folate, but not cobalamin status predicts respiratory morbidity in north Indian children.
  • Gjessing, Håkon K. 2001. Frailty as a stochastic process.
  • Lie, Stein Atle; Engesæter, LB; Havelin, LI; Gjessing, Håkon K.; Vollset, Stein Emil. 1999. Patient mortality after total hip replacement - follow-up of 35938 patients in the Norwegian Arthroplasty Register.
  • Lie, SA; Engesæter, LB; Havelin, LI; Gjessing, Håkon K.; Vollset, Stein Emil. 1999. Mortality after total hip replacement. 10 years follow-up of 39453 patients in the Norwegian Arthroplasty Register.
  • Melve, Kari Klungsøyr.; Gjessing, Håkon; Skjærven, Rolv. 1998. Perinatal mortality and infants' length at birth.
  • Lie, Rolv Terje; Gjessing, Håkon. 1998. Distinguishing maternal and fetal contributions to birth weight using half-sib data.
  • Gjessing, Håkon; Skjærven, R.; Wilcox, Allen J. 1997. Svangerskapsvarigheter og fødselsvekter, noe for en statistiker?
  • Gjessing, Håkon; Skjærven, R.; Wilcox, Allen J. 1997. Svangerskapsvarigheter og fødselsvekter, noe for en statistiker?
  • Gjessing, Håkon; Skjærven, R.; Wilcox, Allen J. 1997. Svangerskapsvarigheter og fødselsvekter, noe for en statistiker?
  • Skjærven, Rolv; Gjessing, Håkon; Dalseth, Gunnar; Bakketeig, L. S. 1997. New standards for birth weight by gestational age using family data.
  • Lie, Rolv Terje; Rasmussen, Svein; Brunborg, H.; Gjessing, Håkon; Lie-Nielsen, E. 1997. Føtalt og maternelt bidrag til risiko for preeklampsi.
  • Lie, Rolv Terje; Rasmussen, Svein; Brunborg, H.; Gjessing, Håkon; Lie-Nielsen, E. 1997. Føtalt og maternelt bidrag til risiko for preeklampsi.
  • Lie, Rolv Terje; Rasmussen, Svein; Brunborg, H.; Gjessing, Håkon; Lie-Nielsen, E. 1997. Føtalt og maternelt bidrag til risiko for preeklampsi.
  • Gjessing, Håkon; Skjærven, R.; Wilcox, Allen J. 1997. Errors in gestational age. A somewhat different analysis of errors in computed length of gestation, using birth weight as reference.
  • Gjessing, Håkon; Skjærven, R.; Wilcox, Allen J. 1997. Errors in gestational age. A somewhat different analysis of errors in computed length of gestation, using birth weight as reference.
  • Gjessing, Håkon; Skjærven, R.; Wilcox, Allen J. 1997. Errors in gestational age. A somewhat different analysis of errors in computed length of gestation, using birth weight as reference.
  • Gjessing, Håkon. 1996. A variation of parameters solution of a quasi-linear Skorohod stochastic differential equations using the Wick product.
Editorial
  • Gjessing, Håkon K.; Skaug, Hans J. 2019. Editorial. Scandinavian Journal of Statistics. 1-1.
  • Håberg, Siri Eldevik; Trogstad, Lill; Gunnes, Nina; Wilcox, Allen J; Gjessing, Håkon K.; Samuelsen, Sven Ove; Skrondal, Anders; Cappelen, Inger; Engeland, Anders; Aavitsland, Preben; Madsen, Steinar; Buajordet, Ingebjørg; Furu, Kari; Nafstad, Per; Vollset, Stein Emil; Feiring, Berit; Nøkleby, Hanne; Magnus, Per; Stoltenberg, Camilla. 2013. Risk of Fetal Death After Pandemic Influenza Virus Infection or Vaccination EDITORIAL COMMENT. Obstetrical and Gynecological Survey. 348-349.
Reader opinion piece
  • Gjessing, Håkon K.; Grøttum, Per; Økland, Inger; Eik-Nes, Sturla. 2010. Comment and reply on: Prediction of the date of delivery based on first trimester ultrasound measurements: an independent method from estimated date of conception. Journal of Maternal-Fetal & Neonatal Medicine. 944-946.
  • Gjessing, Håkon K.; Grøttum, Per. 2007. Accuracy of second trimester fetal head circumference and biparietal diameter for predicting the time of spontaneous birth. Journal of Perinatal Medicine. 350-351.
  • Eik-Nes, Sturla; Grøttum, Per; Gjessing, Håkon K. 2006. Regarding "Term prediction with ultrasound: evaluation of a new dating curve for biparietal diameter". Acta Obstetricia et Gynecologica Scandinavica. 1276-1278.
Academic monograph
  • Aalen, Odd O.; Borgan, Ørnulf; Gjessing, Håkon K. 2008. Survival and event history analysis: a process point of view. 2008.
  • Aalen, Odd O.; Borgan, Ørnulf; Gjessing, Håkon K. 2008. Survival and Event History Analysis: A Process Point of View.
  • Aalen, Odd O.; Borgan, Ørnulf; Gjessing, Håkon K. 2008. Event history analysis: A process point of view.
Thesis at a second degree level
  • Gjessing, Håkon. 1990. Some convergence results for ITO diffusions and optimal stopping.
Popular scientific article
  • Gjessing, Håkon K.; Steiro, Christine; Becher, Georg; Christy, Alfred. 2006. Redusert analytisk tilgjengelighet for PCB i humusfarget vann. Vann. 118-126.
Letter to the editor
  • Gjessing, Håkon K; Grøttum, Per; Økland, Inger; Eik-Nes, Sturla H. 2009. Comment and reply on: Prediction of the date of delivery based on first trimester ultrasound measurements: an independent method from estimated date of conception. Journal of Maternal-Fetal & Neonatal Medicine.
  • Gjessing, Håkon K; Grøttum, Per; Eik-Nes, Sturla H. 2008. Re: A direct method for ultrasound prediction of day of delivery: a new, population-based approach. Problems of accounting for a retrospective selection - Reply. Ultrasound in Obstetrics and Gynecology. 225-227.
  • Eik-Nes, Sturla; Grøttum, Per; Gjessing, Håkon K. 2006. Regarding "Term prediction with ultrasound: evaluation of a new dating curve for biparietal diameter". Acta Obstetricia et Gynecologica Scandinavica. 1276-1279.
Doctoral dissertation
  • Gjessing, Håkon. 1995. Anticipating calculus and wick products.
Academic chapter/article/Conference paper
  • Aalen, Odd Olai; Gjessing, Håkon K. 2003. A look behind survival data: Underlying processes and quasi-stationarity. 14 pages.
Abstract
  • Eggebø, Torbjørn Moe; Klefstad, Olav-Andre; Økland, Inger; Gjessing, Håkon K. 2016. Prenatal detection of macrosomia in pregnancies past term. Ultrasound in Obstetrics and Gynecology.
  • Eggebø, Torbjørn Moe; Klefstad, Olav-Andre; Økland, Inger; Gjessing, Håkon K. 2016. Prenatal detection of low birthweight in pregnancies past term. Ultrasound in Obstetrics and Gynecology.
  • Eggebø, Torbjørn Moe; Klefstad, Olav-Andre; Økland, Inger; Gjessing, Håkon K. 2016. Estimation of fetal weight in pregnancies past term. Ultrasound in Obstetrics and Gynecology.
  • Håberg, Siri Eldevik; Trogstad, Lill; Gunnes, Nina; Gjessing, Håkon K.; Samuelsen, Sven Ove; Cappelen, Inger; Engeland, Anders; Aavitsland, Preben; Madsen, Steinar; Buajordet, Ingebjørg; Furu, Kari; Nafstad, Per; Vollset, Stein Emil; Feiring, Berit; Nøkleby, Hanne; Magnus, Per; Stoltenberg, Camilla. 2012. The 2009 Influenza Pandemic, Vaccination during Pregnancy and Fetal Death: A National Registry-Based Study in Norway. Pharmacoepidemiology and Drug Safety. 382-382.
  • Økland, Inger; Gjessing, Håkon K.; Grøttum, Per; Eik-Nes, Sturla. 2012. OP32.01: The importance of standardizing pregnancy dating models. Ultrasound in Obstetrics and Gynecology. 151-152.
  • Jacobsson, Bo; Brantsæter, Anne Lise; Gjessing, Håkon; Myking, Solveig; Meltzer, Helle Margrete; Haugen, Margaretha; Myhre, Ronny. 2012. Intake of food with antimicrobial diet components and risk of spontaneous preterm delivery. American Journal of Obstetrics and Gynecology. S213-S213.
  • Jacobsson, Bo; Skare, Øivind; Sengpiel, Verena; Myking, Solveig; Østensen, Ingrid Helene Garmann; Brantsæter, Anne Lise; Haugen, Margaretha; Meltzer, Helle Margrete; Magnus, Per; Gjessing, Håkon; Myhre, Ronny. 2012. Genetic variants in gene-environment interaction analysis of probiotic intake in spontaneous preterm delivery. American Journal of Obstetrics and Gynecology. S212-S212.
  • Økland, Ingrid; Gjessing, Håkon K.; Grøttum, Per; Eik-Nes, Sturla. 2012. Advantages of the population-based approch to pregnancy dating demonstrated with results from 73,400 second-trimester ultrasound examinations. Acta Obstetricia et Gynecologica Scandinavica. 116-117.
  • Pay, Aase Serine Devold; Gjessing, Håkon K.; Staff, Anne Cathrine; Jacobsson, Bo; Frøen, Frederik. 2012. A population-based reference chart for fundal height measures. Acta Obstetricia et Gynecologica Scandinavica. 117-118.
  • Eik-Nes, Sturla; Blaas, HG; Grøttum, Per; Gjessing, Håkon K. 2007. Predicting remaining time of pregnancy - a new population-based approach for the prediction of day of delivery based on Femur length. Ultrasound in Obstetrics and Gynecology. 478-478.
  • Lie, Rolv T.; Gjessing, Håkon K; Taylor, Jack; Wilcox, Allen J. 2007. Haplotype relative risk estimation in epidemiological studies; New methodology applied to a study of smoking, relevant detoxification genes and oral clefts in Norway. American Journal of Epidemiology. S142-S142.
  • Lie, Rolv Terje; Gjessing, Håkon K.; Taylor, J; Wilcox, AJ. 2007. Haplotype relative risk estimation in epidemiological studies; New methodology applied to a study of smoking, relevant detoxification genes and oral clefts in Norway. American Journal of Epidemiology. S142.
  • Økland, Inger; Gjessing, Håkon K.; Grøttum, Per; Eggebø, TM; Eik-Nes, Sturla. 2007. A new population-based term prediction method-evaluation of the FL-based predictions. Ultrasound in Obstetrics and Gynecology. 367.
  • Økland, Inger; Gjessing, Håkon K.; Grøttum, Per; Eggebø, TM; Eik-Nes, Sturla. 2007. A new population-based term prediction method-evaluation of the BPD-based predictions. Ultrasound in Obstetrics and Gynecology. 478-479.
Poster
  • Romanowska, Julia; Gjessing, Håkon K.; Jonassen, Inge; Lie, Rolv T. 2015. Haplin — a powerful tool for studying gene-environment interactions.
  • Igland, Jannicke; Vollset, Stein Emil; Nygård, Ottar; Gjessing, Håkon K.; Tell, Grethe S. 2010. Relative importance of risk factors for cardiovascular disease incidence and mortality: a prospective cohort study.
Article in business/trade/industry journal
  • Romanowska, Julia; Haaland, Øystein Ariansen; Jugessur, Astanand; Gjerdevik, Miriam; Xu, Zongli; Taylor, Jack A.; Wilcox, Allen J; Jonassen, Inge; Lie, Rolv T.; Gjessing, Håkon K. 2019. Gene-methylation interactions: Discovering region-wise DNA methylation levels that modify SNP-associated disease risk. bioRxiv - the preprint server for biology.

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