Håkon K. Gjessing

Professor

Department of Global Public Health and Primary Care

Go to Håkon K. Gjessing's personal Home Page

E-mailhakon.gjessing@uib.no
Phone+47 975 22 262+47 97522262
Visitor Address
Alrek helseklynge, blokk D, Årstadveien 17

5009 Bergen
Postal Address
Postboks 7804

5020 Bergen

Publications

Academic article

Show author(s) (2023). The X-factor in ART: does the use of assisted reproductive technologies influence DNA methylation on the X chromosome? Human Genomics. 22 pages.
Show author(s) (2023). Statistical methods to detect mother-father genetic interaction effects on risk of infertility: A genome-wide approach. Genetic Epidemiology. 503-519.
Show author(s) (2023). Infection with SARS-CoV-2 during pregnancy and risk of stillbirth: a Scandinavian registry study. BMJ Public Health. 9 pages.

Show author(s) (2022). Effectiveness of mRNA booster vaccination against mild, moderate, and severe COVID-19 caused by the Omicron variant in a large, population-based, Norwegian cohort. Journal of Infectious Diseases. 1924-1933.
Show author(s) (2022). DNA methylation in newborns conceived by assisted reproductive technology. Nature Communications. 1-12.
Show author(s) (2022). Association of SARS-CoV-2 Vaccination during Pregnancy with Pregnancy Outcomes. Journal of the American Medical Association (JAMA). 1469-1477.

Show author(s) (2021). Wavelet Screening: a novel approach to analyzing GWAS data. BMC Bioinformatics. 20 pages.
Show author(s) (2021). Wavelet Screening identifies regions highly enriched for differentially methylated loci for orofacial clefts. NAR Genomics and Bioinformatics. 1-16.
Show author(s) (2021). Psychosocial work factors and sick leave risk after a terrorist bomb attack: a survey and registry-based longitudinal study of governmental employees in Norway. BMJ Open. 9 pages.
Show author(s) (2021). Pregnancy and risk of COVID-19: a Norwegian registry-linkage study. BJOG: An International Journal of Obstetrics and Gynaecology. 101-109.
Show author(s) (2021). Growth in children conceived by ART. Human Reproduction. 1074-1082.
Show author(s) (2021). An EPIC predictor of gestational age and its application to newborns conceived by assisted reproductive technologies. Clinical Epigenetics. 13 pages.
Show author(s) (2021). A fast wavelet-based functional association analysis replicates several susceptibility loci for birth weight in a Norwegian population. BMC Genomics. 9 pages.

Show author(s) (2020). Seasonal and pandemic influenza during pregnancy and risk of fetal death: A Norwegian registry‑based cohort study. European Journal of Epidemiology (EJE). 371-379.
Show author(s) (2020). PHLDA2 gene polymorphisms and risk of HELLP syndrome and severe preeclampsia. Pregnancy Hypertension. 190-194.
Show author(s) (2020). Heritability curves: A local measure of heritability in family models. Statistics in Medicine. 1357-1382.
Show author(s) (2020). Gene-methylation interactions: Discovering region-wise DNA methylation levels that modify SNP-associated disease risk. Clinical Epigenetics. 18 pages.
Show author(s) (2020). Design efficiency in genetic association studies. Statistics in Medicine. 1292-1310.
Show author(s) (2020). Blood-based epigenetic estimators of chronological age in human adults using DNA methylation data from the Illumina MethylationEPIC array. BMC Genomics. 13 pages.

Show author(s) (2019). Placental epigenetic clocks: estimating gestational age using placental DNA methylation levels. Aging. 4238-4253.
Show author(s) (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.
Show author(s) (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.
Show author(s) (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.
Show author(s) (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.

Show author(s) (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.
Show author(s) (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.

Show author(s) (2017). Variants in the fetal genome near FLT1 are associated with risk of preeclampsia. Nature Genetics. 1255-1260.
Show author(s) (2017). Symfyse-fundus-mål – prediktiv verdi av ny referansekurve. Tidsskrift for Den norske legeforening. 717-720.
Show author(s) (2017). Svangerskapsdatering. Norsk Epidemiologi. 13-18.
Show author(s) (2017). Parent-of-origin-environment interactions in case-parent triads with or without independent controls. Annals of Human Genetics. 60-73.
Show author(s) (2017). Human birth weight and reproductive immunology: testing for interactions between maternal and offspring KIR and HLA-C genes. Human Heredity. 181-193.
Show author(s) (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.
Show author(s) (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.
Show author(s) (2017). A Population-Based Study of Effects of Genetic Loci on Orofacial Clefts. Journal of Dental Research. 1322-1329.

Show author(s) (2016). Seed viability and germination success of Acacia tortilis along land-use and aridity gradients in the Eastern Sahara. Ecology and Evolution. 256-266.
Show author(s) (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.
Show author(s) (2016). Prediction of gestational age based on genome-wide differentially methylated regions. Genome Biology. 9 pages.
Show author(s) (2016). Fetal size monitoring and birth-weight prediction: a new population-based approach. Ultrasound in Obstetrics and Gynecology. 500-507.
Show author(s) (2016). Estimation of fetal weight in pregnancies past term. Acta Obstetricia et Gynecologica Scandinavica. 183-189.

Show author(s) (2015). Genetic determinants of enterovirus infections: Polymorphisms in type 1 diabetes and innate immune genes in the MIDIA study. Viral immunology. 556-563.

Show author(s) (2014). Maternal KIR in combination with paternal HLA-C2 regulate human birth weight. Journal of Immunology. 5069-5073.
Show author(s) (2014). KIR and HLA-C: Immunogenetic regulation of human birth weight. Norsk Epidemiologi. 107-110.

Show author(s) (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.
Show author(s) (2013). Risk of Fetal Death after Pandemic Influenza Virus Infection or Vaccination. New England Journal of Medicine. 333-340.
Show author(s) (2013). GWAS of 126,559 Individuals Identifies Genetic Variants Associated with Educational Attainment. Science. 1467-1471.
Show author(s) (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.
Show author(s) (2013). A new population-based reference curve for symphysis-fundus height. Acta Obstetricia et Gynecologica Scandinavica. 925-933.

Show author(s) (2012). X-Linked Genes and Risk of Orofacial Clefts: Evidence from Two Population-Based Studies in Scandinavia. PLOS ONE.
Show author(s) (2012). Using offspring-parent triads to study complex traits : a tutorial based on orofacial clefts. Norsk Epidemiologi. 251-267.
Show author(s) (2012). Risk factors for extended duration of acute diarrhea in young children. PLOS ONE.
Show author(s) (2012). Relative importance of risk factors for coronary heart disease - The Hordaland Homocysteine Study. Scandinavian Cardiovascular Journal. 316-323.
Show author(s) (2012). Maternal tryptophan and kynurenine pathway metabolites and risk of preeclampsia. Obstetrics and Gynecology. 1243-1250.
Show author(s) (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.
Show author(s) (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.
Show author(s) (2012). Application of a Novel Hybrid Study Design to Explore Gene-Environment Interactions in Orofacial Clefts. Annals of Human Genetics. 221-236.
Show author(s) (2012). Advantages of the population-based approach to pregnancy dating: results from 23 020 ultrasound examinations. Ultrasound in Obstetrics and Gynecology. 563-568.

Show author(s) (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.
Show author(s) (2011). Intake of probiotic food and risk of spontaneous preterm delivery. American Journal of Clinical Nutrition. 151-157.
Show author(s) (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 Part A: Clinical and Molecular Teratology. 85-92.
Show author(s) (2011). Extensive variation and low heritability of DNA methylation identified in a twin study. Genome Research. 1813-1821.
Show author(s) (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.
Show author(s) (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.
Show author(s) (2011). A hierarchical frailty model applied to two-generation melanoma data. Lifetime Data Analysis. 445-460.

Show author(s) (2010). Recurrent events and the exploding Cox model. Lifetime Data Analysis. 525-546.
Show author(s) (2010). Maternal genes and facial clefts in offspring: a comprehensive search for genetic associations in two population-based cleft studies from Scandinavia. PLOS ONE.
Show author(s) (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.
Show author(s) (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.

Show author(s) (2009). Vaccination as teenagers against meningococcal disease and the risk of the chronic fatigue syndrome. Vaccine. 23-27.
Show author(s) (2009). Self-selection and bias in a large prospective pregnancy cohort in Norway. Paediatric and Perinatal Epidemiology. 597-608.
Show author(s) (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.
Show author(s) (2009). Genetic determinants of facial clefting: analysis of 357 candidate genes using two national cleft studies from Scandinavia. PLOS ONE.

Show author(s) (2008). Maternal smoking and oral clefts - The role of detoxification pathway genes. Epidemiology. 606-615.
Show author(s) (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.
Show author(s) (2008). Biometrical modelling in genetics: are complex traits too complex? Statistical Methods in Medical Research. 75-96.
Show author(s) (2008). Biometrical modeling of twin and family data using standard mixed model software. Biometrics. 280-288.

Show author(s) (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.
Show author(s) (2007). Marriages and psychological distress among adult offspring of divorce: A Norwegian study. Scandinavian Journal of Psychology. 467-476.
Show author(s) (2007). Genetic polymorphisms in transforming growth factor beta-1 (TGFB1) and childhood asthma and atopy. Human Genetics. 529-538.
Show author(s) (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.
Show author(s) (2007). Folate, but not vitamin B-12 status, predicts respiratory morbidity in north Indian children. American Journal of Clinical Nutrition. 139-144.
Show author(s) (2007). A direct method for ultrasound prediction of day of delivery: a new, population-based approach. Ultrasound in Obstetrics and Gynecology. 19-27.

Show author(s) (2006). Smoking and deaths between 40 and 70 years of age in women and men. Annals of Internal Medicine. 381-389.
Show author(s) (2006). Plasma total homocysteine level and bone mineral density - The Hordaland homocysteine study. Archives of Internal Medicine. 88-94.
Show author(s) (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.
Show author(s) (2006). Likelihood ratio tests in behavioral genetics: Problems and solutions. Behavior Genetics. 331-340.
Show author(s) (2006). Genetic polymorphisms in arginase I and II and childhood asthma and atopy. Journal of Allergy and Clinical Immunology. 119-126.
Show author(s) (2006). Case-parent triads: Estimating single- and double-dose effects of fetal and maternal disease gene haplotypes. Annals of Human Genetics. 382-396.

Show author(s) (2005). Folate supplementation and twin pregnancies. Epidemiology. 201-205.
Show author(s) (2005). Case-parent triads: Estimating single- and double-dose effects of fetal and maternal disease gene haplotypes. Annals of Human Genetics. 1-15.

Show author(s) (2004). Survival models based on the Ornstein-Uhlenbeck process. Lifetime Data Analysis. 407-423.
Show author(s) (2004). Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. Ugeskrift for Læger. 4051-4053.
Show author(s) (2004). Dependency issues in survival analyses of 55 782 primary hip replacements from 47 355 patients. Statistics in Medicine. 3227-3240.
Show author(s) (2004). Analysis of testicular cancer data using a frailty model with familial dependence. Statistics in Medicine. 617-632.

Show author(s) (2003). Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 286-291.
Show author(s) (2003). Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 286-291.
Show author(s) (2003). Frailty models based on L{\'e}vy processes. Advances in Applied Probability. 532-550.

Show author(s) (2001). Understanding the shape of the hazard rate: a process point of view. Statistical Science. 1-22.
Show author(s) (2001). Understanding the shape of the hazard rate: A process point of view - Comments and rejoinder. Statistical Science. 14-22.
Show author(s) (2001). Pneumococcal pulmonary infection, septicaemia and survival in young zinc-depleted mice. British Journal of Nutrition. 301-306.
Show author(s) (2001). Paternal contribution to birth weight. Journal of Epidemiology and Community Health. 873-877.

Show author(s) (2000). Plasma total homocysteine, pregnancy complications, and adverse pregnancy outcomes: the Hordaland Homocysteine Study. American Journal of Clinical Nutrition. 962-968.
Show author(s) (2000). Plasma total homocysteine, pregnancy complications, and adverse pregnancy outcomes: the Hordaland Homocysteine Study. American Journal of Clinical Nutrition. 962-968.
Show author(s) (2000). New standards for birth weight by gestational age using family data. American Journal of Obstetrics and Gynecology. 689-696.
Show author(s) (2000). New standards for birth weight by gestational age using family data. American Journal of Obstetrics and Gynecology. 689-696.
Show author(s) (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.
Show author(s) (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.
Show author(s) (2000). Measurement of specific IgA in faecal extracts and intestinal lavage fluid for monitoring of mucosal immune responses. Journal of Immunological Methods (JIM). 53-62.
Show author(s) (2000). Measurement of specific IgA in faecal extracts and intestinal lavage fluid for monitoring of mucosal immune responses. Journal of Immunological Methods (JIM). 53-62.
Show author(s) (2000). Measurement of specific IgA in faecal extracts and intestinal lavage fluid for monitoring of mucosal immune responses. Journal of Immunological Methods (JIM). 53-62.
Show author(s) (2000). Infants' length at birth: an independent effect on perinatal mortality. Acta Obstetricia et Gynecologica Scandinavica. 459-464.
Show author(s) (2000). Infant's length at birth: an independent effect on perinatal mortality. Acta Obstetricia et Gynecologica Scandinavica. 459-464.
Show author(s) (2000). Birthweight by gestational age in Norway. Acta Obstetricia et Gynecologica Scandinavica. 440-449.
Show author(s) (2000). Birthweight by gestational age in Norway. Acta Obstetricia et Gynecologica Scandinavica. 440-449.
Show author(s) (2000). A nonlinear parabolic equation with noise. A reduction method. Potential Analysis. 385-401.
Show author(s) (2000). A nonlinear parabolic equation with noise - A reduction method. Potential Analysis. 385-401.

Show author(s) (1999). Recurrence of gestational age in sibships: Implications for perinatal mortality. American Journal of Epidemiology. 756-762.
Show author(s) (1999). Recurrence of gestational age in sibships: Implications for perinatal mortality. American Journal of Epidemiology. 756-762.
Show author(s) (1999). Community-based randomized controlled trial of reduced osmolarity oral rehydration solution in acute childhood diarrhea. Pediatr Infect Dis J. 789-795.

Show author(s) (1998). Fetal and maternal contributions to risk of pre-eclampsia: population based study. BMJ. British Medical Journal. 1343-1347.

Show author(s) (1997). Ruin theory with stochastic return on investments. Advances in Applied Probability. 965-985.
Show author(s) (1997). Ruin theory with stochastic return on investments. Advances in Applied Probability. 965-985.
Show author(s) (1997). Present value distributions with applications to ruin theory and stochastic equations. Stochastic Processes and their Applications. 123-144.
Show author(s) (1997). Present value distributions with applications to ruin theory and stochastic equations. Stochastic Processes and their Applications. 123-144.
Show author(s) (1997). Optimal choice of dividend barriers for a risk process with stochastic return on investments. Insurance, Mathematics & Economics. 215-223.
Show author(s) (1997). Optimal choice of dividend barriers for a risk process with stochastic return on investments. Insurance, Mathematics & Economics. 215-223.
Show author(s) (1997). Fetal and maternal contributions to risk of pre-eclampsia: population based study. BMJ. British Medical Journal. 1343-47.

Show author(s) (1994). A stochastic model for the presence/absence of readings in Nidrstigningar Saga. World archaeology.

Report

Show author(s) (2006). Hvor dødelig er røyking? Rapport om dødsfall og tapte leveår som skyldes røyking. .
Show author(s) (2006). Hvor dødelig er røyking? Rapport om dødsfall og tapte leveår som skyldes røyking. 2006:4. 2006:4. .

Show author(s) (1994). Integral conditions for Skorod stochastical differential equations. 24. 24. .

Show author(s) (1993). A note on the Wick product. Report No.23 March 1993. .

Popular scientific lecture

Show author(s) (1997). Blødninger tidlig i svangerskapet; farligere enn tidligere antatt?

Academic lecture

Show author(s) (2016). Prenatal detection of macrosomia in pregnancies past term.
Show author(s) (2016). Prenatal detection of low birthweight in pregnancies past term.
Show author(s) (2016). Estimation of fetal weight in pregnancies past term.

Show author(s) (2005). Folate, but not cobalamin status predicts respiratory morbidity in north Indian children.

Show author(s) (2001). Frailty as a stochastic process.

Show author(s) (1999). Patient mortality after total hip replacement - follow-up of 35938 patients in the Norwegian Arthroplasty Register.
Show author(s) (1999). Mortality after total hip replacement. 10 years follow-up of 39453 patients in the Norwegian Arthroplasty Register.

Show author(s) (1998). Perinatal mortality and infants' length at birth.
Show author(s) (1998). Distinguishing maternal and fetal contributions to birth weight using half-sib data.

Show author(s) (1997). Svangerskapsvarigheter og fødselsvekter, noe for en statistiker?
Show author(s) (1997). Svangerskapsvarigheter og fødselsvekter, noe for en statistiker?
Show author(s) (1997). Svangerskapsvarigheter og fødselsvekter, noe for en statistiker?
Show author(s) (1997). New standards for birth weight by gestational age using family data.
Show author(s) (1997). Føtalt og maternelt bidrag til risiko for preeklampsi.
Show author(s) (1997). Føtalt og maternelt bidrag til risiko for preeklampsi.
Show author(s) (1997). Føtalt og maternelt bidrag til risiko for preeklampsi.
Show author(s) (1997). Errors in gestational age. A somewhat different analysis of errors in computed length of gestation, using birth weight as reference.
Show author(s) (1997). Errors in gestational age. A somewhat different analysis of errors in computed length of gestation, using birth weight as reference.
Show author(s) (1997). Errors in gestational age. A somewhat different analysis of errors in computed length of gestation, using birth weight as reference.

Show author(s) (1996). A variation of parameters solution of a quasi-linear Skorohod stochastic differential equations using the Wick product.

Editorial

Show author(s) (2019). Special issue dedicated to Odd O. Aalen. Lifetime Data Analysis. 587-592.
Show author(s) (2019). Editorial. Scandinavian Journal of Statistics. 1-1.

Show author(s) (2013). Risk of Fetal Death After Pandemic Influenza Virus Infection or Vaccination EDITORIAL COMMENT. Obstetrical and Gynecological Survey. 348-349.

Reader opinion piece

Show author(s) (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.

Show author(s) (2007). Accuracy of second trimester fetal head circumference and biparietal diameter for predicting the time of spontaneous birth. Journal of Perinatal Medicine. 350-351.

Show author(s) (2006). Regarding "Term prediction with ultrasound: evaluation of a new dating curve for biparietal diameter". Acta Obstetricia et Gynecologica Scandinavica. 1276-1278.

Academic monograph

Show author(s) (2008). Survival and event history analysis: a process point of view. 2008.
Show author(s) (2008). Survival and Event History Analysis: A Process Point of View.
Show author(s) (2008). Event history analysis: A process point of view.

Thesis at a second degree level

Show author(s) (1990). Some convergence results for ITO diffusions and optimal stopping.