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University of Bergen
Knut-Arne Wensaas's picture

Knut-Arne Wensaas

NORCE, Uni Research Helse - Allmennmedisin
  • E-mailKnut-arne.Wensaas@uib.no
  • Phone+47 55 58 61 33+47 911 04 774
  • Visitor Address
    Kalfarveien 31
  • Postal Address
    Postboks 7800
    5020 Bergen
Journal articles
  • Emberland, Knut Erik; Wensaas, Knut-Arne; Litleskare, Sverre; Rørtveit, Guri. 2019. Consultations for gastroenteritis in general practice and out-of-hours services in Norway 2006–15. Family Practice. 36: 614-620. doi: 10.1093/fampra/cmy133
  • Litleskare, Sverre; Rørtveit, Guri; Eide, Geir Egil; Emberland, Knut Erik; Hanevik, Kurt; Langeland, Nina; Wensaas, Knut-Arne. 2019. Quality of life and its association with irritable bowel syndrome and fatigue ten years after giardiasis. Neurogastroenterology and Motility. 31. doi: 10.1111/nmo.13559
  • Thorsen, Bente; Frydenberg, Karin; Wensaas, Knut-Arne; Christiansen, Line Cecilie; Olsen, Bodil Aasvang; Kehlet, Karsten; Fagerberg, Ellen Anita; Svendsen, Kjell-Olav; Borgen, Tove; Viste, Eirik. 2019. Fastlegens rolle i kreftomsorgen. Tidsskrift for Den norske legeforening. 139. 5 pages. doi: 10.4045/tidsskr.19.0180
  • Bjorvatn, Bjørn; Straand, Jørund; Halvorsen, Peder Andreas; Wensaas, Knut-Arne; Bellika, Johan Gustav; Fors, Egil Andreas; Gjelstad, Svein; Kristoffersen, Espen Saxhaug; Øxnevad-Gundersen, Berit; Rørtveit, Guri. 2018. PraksisNett - et nettverk av fastlegepraksiser. En storsatsing på forskning i allmennpraksis. Utposten. 4. 40-43.
  • Litleskare, Sverre; Rørtveit, Guri; Eide, Geir Egil; Hanevik, Kurt; Langeland, Nina; Wensaas, Knut-Arne. 2018. Prevalence of irritable bowel syndrome and chronic fatigue 10 years after giardia infection. Clinical Gastroenterology and Hepatology. 16: 1064-1072. doi: 10.1016/j.cgh.2018.01.022
  • Wensaas, Knut-Arne; Heron, Jon; Redmond, Niamh; Turnbull, Sophie; Christensen, Hannah; Thornton, Hannah; Peters, Tim J.; Blair, Peter S.; Hay, Alastair D. 2018. Post-consultation illness trajectories in children with acute cough and respiratory tract infection: Prospective cohort study. Family Practice. 35: 676-683. doi: 10.1093/fampra/cmy021
  • Bakken, Inger Johanne; Wensaas, Knut-Arne; Furu, Kari; Grøneng, Gry Marysol; Stoltenberg, Camilla; Øverland, Simon Nygaard; Håberg, Siri Eldevik. 2017. Legesøkning og legemiddeluttak etter innføring av nye fraværsregler. Tidsskrift for Den norske legeforening. 9 pages. doi: 10.4045/tidsskr.17.0427
  • Bakken, Inger Johanne; Wensaas, Knut-Arne; Grøneng, Gry Marysol; Fretheim, Atle; Stoltenberg, Camilla; Klepp, Knut Inge; Håberg, Siri Eldevik; Øverland, Simon Nygaard. 2017. Russefeiring og eksamenstid – bruk av fastlege og legevakt. Tidsskrift for Den norske legeforening. 4 pages. doi: 10.4045/tidsskr.17.0158
  • Mujagic, Zlatan; Jonkers, Daisy M.A.E.; Hungin, A. Pali S.; De Wit, Niek J.; Wensaas, Knut-Arne; Palka, Margaret; Leeters, Vico; Kruimel, Joanna W.; Leue, Carsten; Masclee, Ad A.M.; Muris, Jean W.M. 2017. Use of Rome criteria for the diagnosis of irritable bowel syndrome in primary care: a survey among European countries. European Journal of Gastroenterology and Hepathology. 29: 651-656. doi: 10.1097/MEG.0000000000000848
  • Boeckxstaens, Guy E.; Drug, Vasile Liviu; Dumitraşcu, Dan Lucian; Farmer, Adam Donald; Hammer, Johann; Hausken, Trygve; Niesler, Beate; Pohl, Daniel; Pojskic, Lejla; Polster, Annikka V.; Simrén, Magnus; Goebel-Stengel, Miriam; Van Oudenhove, Lukas; Vassallo, Mario; Wensaas, Knut-Arne; Aziz, Qasim; Houghton, Lesley Anne. 2016. Phenotyping of subjects for large scale studies on patients with IBS. Neurogastroenterology and Motility. 28: 1134-1147. doi: 10.1111/nmo.12886
  • Hunskår, Gunnhild Sellevoll; Bjorvatn, Bjørn; Wensaas, Knut-Arne; Hanevik, Kurt; Eide, Geir Egil; Langeland, Nina; Rørtveit, Guri. 2016. Excessive daytime sleepiness, sleep need and insomnia 3 years after Giardia infection: A cohort study. Sleep Health. 2: 154-158. doi: 10.1016/j.sleh.2016.03.005
  • Litleskare, Sverre; Rørtveit, Guri; Eide, Geir Egil; Hanevik, Kurt; Langeland, Nina; Wensaas, Knut-Arne. 2016. Irritable bowel syndrome ten years after acute Giardia lamblia infection: A controlled prospective cohort study. Neurogastroenterology and Motility. 28: 59-59.
  • Wensaas, Knut-Arne. 2016. Why the quest for early cancer diagnosis has gone too far. The Digest. 8: 12.
  • Wensaas, Knut-Arne; Hanevik, Kurt; Hausken, Trygve; Eide, Geir Egil; Langeland, Nina; Mørch, Kristine; Rørtveit, Guri. 2016. Postinfectious and sporadic functional gastrointestinal disorders have different prevalences and rates of overlap: results from a controlled cohort study 3 years after acute giardiasis. Neurogastroenterology and Motility. 28: 1561-1569. doi: 10.1111/nmo.12856
  • Wensaas, Knut-Arne; Hungin, Amrit Pali. 2016. Diverticular Disease in the Primary Care Setting. Journal of Clinical Gastroenterology. 50: S86-S88. doi: 10.1097/MCG.0000000000000596
  • Litleskare, Sverre; Wensaas, Knut-Arne; Eide, Geir Egil; Hanevik, Kurt; Kahrs, Gudrun Elise; Langeland, Nina; Rørtveit, Guri. 2015. Perceived food intolerance and irritable bowel syndrome in a population 3 years after a giardiasis-outbreak: a historical cohort study. BMC Gastroenterology. 15. doi: 10.1186/s12876-015-0393-0
  • Persson, Robert; Wensaas, Knut-Arne; Hanevik, Kurt; Eide, Geir Egil; Langeland, Nina; Rørtveit, Guri. 2015. The relationship between irritable bowel syndrome, functional dyspepsia, chronic fatigue and overactive bladder syndrome: A controlled study 6 years after acute gastrointestinal infection. BMC Gastroenterology. 15. doi: 10.1186/s12876-015-0296-0
  • Wensaas, Knut-Arne. 2015. ESPCG - Still crazy after all these years. EuroDigest. 2. 1 pages.
  • Hanevik, Kurt; Wensaas, Knut-Arne; Rørtveit, Guri; Eide, Geir Egil; Mørch, Kristine; Langeland, Nina. 2014. Irritable bowel syndrome and chronic fatigue 6 years after Giardia infection: A controlled prospective cohort study. Clinical Infectious Diseases. 59: 1394-1400. doi: 10.1093/cid/ciu629
  • Mørch, Kristine; Hanevik, Kurt; Rivenes, Ann Christin; Bødtker, Jørn; Næss, Halvor; Stubhaug, Bjarte; Wensaas, Knut-Arne; Rørtveit, Guri; Eide, Geir Egil; Hausken, Trygve; Langeland, Nina. 2013. Chronic fatigue syndrome 5 years after giardiasis: differential diagnoses, characteristics and natural course. BMC Gastroenterology. 13. 17 pages. doi: 10.1186/1471-230X-13-28
  • Hunskår, Gunnhild Sellevoll; Langeland, Nina; Wensaas, Knut-Arne; Hanevik, Kurt; Eide, Geir Egil; Mørch, Kristine; Rørtveit, Guri. 2012. The impact of atopic disease on the risk of post-infectious fatigue and irritable bowel syndrome 3 years after Giardia infection. A historic cohort study. Scandinavian Journal of Gastroenterology. 47: 956-961. doi: 10.3109/00365521.2012.696681
  • Simonsen, Kristian Anton; Hunskaar, Steinar; Wensaas, Knut-Arne; Rørtveit, Sverre; Cox, Rebecca Jane; Njølstad, Gro; Rørtveit, Guri. 2012. Influenza-like illness in general practice in Norway: clinical course and attitudes towards vaccination and preventive measures during the 2009 pandemic. Family Practice. 29: 139-146. Published 2011-09-05. doi: 10.1093/fampra/cmr064
  • Wensaas, Knut-Arne; Langeland, Nina; Hanevik, Kurt; Mørch, Kristine; Eide, Geir Egil; Rørtveit, Guri. 2012. Irritable bowel syndrome and chronic fatigue 3 years after acute giardiasis: historic cohort study. Gut. 61: 214-219. doi: 10.1136/gutjnl-2011-300220
  • Rørtveit, Sverre; Hunskaar, Steinar; Wensaas, Knut-Arne; Simonsen, Kristian Anton; Rørtveit, Guri. 2011. Influensapandemien hausten 2009 i ein vestlandskommune. Tidsskrift for Den norske legeforening. 131: 675-679. doi: 10.4045/tidsskr.10.0858
  • Wensaas, Knut-Arne; Langeland, Nina; Rørtveit, Guri. 2010. Post-infectious gastrointestinal symptoms after acute Giardiasis. A 1-year follow-up in general practice. Family Practice. 27: 255-259. doi: 10.1093/fampra/cmq005
  • Mørch, Kristine; Hanevik, Kurt; Rørtveit, Guri; Wensaas, Knut-Arne; Eide, Geir Egil; Hausken, Trygve; Langeland, Nina. 2009. High rate of fatigue and abdominal symptoms two years after an outbreak of giardiasis. Transactions of the Royal Society of Tropical Medicine and Hygiene. 103: 530-532.
  • Mørch, Kristine; Hanevik, Kurt; Rørtveit, Guri; Wensaas, Knut-Arne; Eide, Geir Egil; Hausken, Trygve; Langeland, Nina. 2009. Severity of Giardia infection associated with post-infectious fatigue and abdominal symptoms two years after. BMC Infectious Diseases. 9. Published 2009-12-15. doi: 10.1186/1471-2334-9-206
  • Mørch, Kristine; Hanevik, Kurt; Rørtveit, Guri; Wensaas, Knut-Arne; Eide, Geir Egil; Hausken, Trygve; Langeland, Nina. 2009. Severity of Giardia infection associated with post-infectious fatigue and abdominal symptoms two years after. BMC Infectious Diseases. 9. doi: 10.1186/1471-2334-9-206
  • Mørch, Kristine; Hanevik, Kurt; Rørtveit, Guri; Wensaas, Knut-Arne; Langeland, Nina. 2009. High rate of fatigue and abdominal symptoms 2 years after an outbreak of giardiasis. Transactions of the Royal Society of Tropical Medicine and Hygiene. 103: 530-532. doi: 10.1016/j.trstmh.2009.01.010
  • Wensaas, Knut-Arne; Langeland, Nina; Rørtveit, Guri. 2009. Prevalence of recurring symptoms after infection with Giardia lamblia in a non-endemic area. Scandinavian Journal of Primary Health Care. 27: 12-17. doi: 10.1080/02813430802602393
  • Wensaas, Knut-Arne; Langeland, Nina; Rørtveit, Guri. 2009. Prevalence of recurring symptoms after infection with Giardia lamblia in a non-endemic area. Scandinavian Journal of Primary Health Care. 27: 12-17.
  • Wensaas, Knut-Arne; Langeland, Nina; Rørtveit, Guri. 2007. Avdekking av giardiasisutbruddet i Bergen 2004. Tidsskrift for Den norske legeforening. 127: 2222-2225.
  • Rørtveit, Guri; Wensaas, Knut-Arne. 2004. En moderne epidemi. Tidsskrift for Den norske legeforening. 124. 1 pages.
Reports and theses
  • Wensaas, Knut-Arne. 2017. Efficacy and Cost-Effectiveness of Alendronate for the Prevention of Fractures in Postmenopausal Women in Norway. Knowledge Centre for the Health Services at The Norwegian Institute of Public Health, Oslo.
  • Hagen, Gunhild; Wisløff, Torbjørn; Falch, Jan; Lofthus, Cathrine; Frihagen, Frede; Wensaas, Knut-Arne; Granum, Lars; Nevjar, Janicke; Kristiansen, Ivar Sønbø; Klemp, Marianne. 2011. Efficacy and cost-effectiveness of alendronate for the prevention of fractures in postmenopausal women in Norway. Rapport fra Kunnskapssenteret. 10/2011. Nasjonalt kunnskapssenter for helsetjenesten, Oslo. 113 pages.
  • Wensaas, Knut-Arne. 2011. Giardiasis in Bergen. Outbreak and clinical consequences. University of Bergen.
Book sections
  • Wensaas, Knut-Arne. 2015. New Era for Clinical Research in Primary Care. 98, pages 300-302. In:
    • Ungan, Mehmet; Steylaerts, Carl. 2015. The World book of family medicine - European edition. 314 pages. ISBN: 9789612819842.

More information in national current research information system (CRIStin)

Fields of competence 
General Practice
Infectious diseases
Gastroenterology

Research groups