2025

• Sand, Trond Halfdan; Uglem, Martin; Johnsen, Gjermund; Grøtting, Arnstein; Dunker, Øystein; Sandvik, Jorunn. (2025) Sensory Nerve Conduction Amplitudes and Z-Compounds Depend on Body Mass Index in Overweight and Obese Individuals. Muscle and Nerve
  Academic article
• Hyldmo, Åsne Ask; Hoff, Dag Arne Lihaug; Wibe, Arne; Bjerkan, Kirsti Kverndokk; Nymo, Siren; Johnsen, Gjermund. (2025) Chronic Abdominal Pain and Gastrointestinal Symptoms 12 Years After Primary Roux-en-Y Gastric Bypass: A Cross-Sectional Controlled Study. Obesity Surgery
  Academic article
• Nymo, Siren; Lundanes, Julianne; Rehfeld, Jens Frederik; Holst, Jens Juul; Madsbad, Sten; Dirksen, Carsten. (2025) Homeostatic Appetite and Hedonic Hunger 13 Years After Roux-en-Y Gastric Bypass: Potential Associations and Predictive Value in Determining Long-Term Weight Loss Outcomes. Obesity Surgery
  Academic article
• Barkhall, Eirin Rosø; Tro, Johanne; Sandvik, Jorunn; Nymo, Siren; Kulseng, Bård Eirik; Johnsen, Gjermund. (2025) Lipid Changes 10–15 Years After Roux-en-Y Gastric Bypass: A Prospective Observational Study. Obesity Surgery
  Academic article

2024

• Roth, Kjetil; Støle, Maria; Vadseth, Ingvild; Samstad, Eivind Ottersen; Sandvik, Jorunn; Hoff, Dag Arne Lihaug. (2024) Long-term changes in lung function after Roux-en-Y gastric bypass in patients with severe obesity. Clinical Obesity
  Academic article
• Huke, Camilla Johannesen; Romsaas, Therese; Vanky, Eszter Ilona; Huse, Karoline Evjen; Ødegård, Rønnaug Astri; Nymo, Siren. (2024) The impact of obesity surgery on newborn anthropometrics in women with and without polycystic ovary syndrome. Archives of Gynecology and Obstetrics
  Academic article
• Brudeseth, Simen; Sandvik, Jorunn; Nymo, Siren; Johnsen, Gjermund; Kulseng, Bård Eirik; Hoff, Dag Arne Lihaug. (2024) The Prevalence of Bradycardia 12 Years After Roux-en-Y Gastric Bypass for Severe Obesity. Obesity Surgery
  Academic article
• Bjerkan, Kirsti Kverndokk; Sandvik, Jorunn; Nymo, Siren; Johnsen, Gjermund; Hyldmo, Åsne Ask; Kulseng, Bård Eirik. (2024) Postbariatric hypoglycemia, abdominal pain and gastrointestinal symptoms after Roux-en-Y gastric bypass explored by continuous glucose monitoring. Obesity Research and Clinical Practice
  Academic article
• Sand, Trond Halfdan; Grøtting, Arnstein; Uglem, Martin; Augestad, Nils; Johnsen, Gjermund; Sandvik, Jorunn. (2024) Neuropathy 10–15 years after Roux-en-Y gastric bypass for severe obesity: A community-controlled nerve conduction study. Clinical Neurophysiology Practice (CNP)
  Academic article

2023

• Bjerkan, Kirsti Kverndokk; Sandvik, Jorunn; Nymo, Siren; Græslie, Hallvard; Johnsen, Gjermund; Mårvik, Ronald. (2023) Vitamin and Mineral Deficiency 12 Years After Roux-en-Y Gastric Bypass a Cross-Sectional Multicenter Study. Obesity Surgery
  Academic article
• Nymo, Siren; Lundanes, Julianne; Eriksen, Kevin; Aukan, Marthe Isaksen; Rehfeld, Jens Frederik; Holst, Jens Juul. (2023) Suboptimal Weight Loss 13 Years After Roux-en-Y Gastric Bypass Is Associated with Blunted Appetite Response. Obesity Surgery
  Academic article

2022

• Nymo, Siren; Skjølsvold, Oda; Aukan, Marthe Isaksen; Finlayson, Graham; Græslie, Hallvard; Mårvik, Ronald. (2022) Suboptimal Weight Loss 13 Years After Roux-en-Y Gastric Bypass: Is Hedonic Hunger, Eating Behaviour and Food Reward to Blame?. Obesity Surgery
  Academic article
• Belgau, Ingrid Martine; Johnsen, Gjermund; Græslie, Hallvard; Mårvik, Ronald; Nymo, Siren; Bjerkan, Kirsti Kverndokk. (2022) Frequency of cholelithiasis in need of surgical or endoscopic treatment a decade or more after Roux-en-Y gastric bypass. Surgical Endoscopy
  Academic article
• Bjerkan, Kirsti Kverndokk; Sandvik, Jorunn; Nymo, Siren; Græslie, Hallvard; Johnsen, Gjermund; Mårvik, Ronald. (2022) The Long-Term Impact of Postoperative Educational Programs on Weight Loss After Roux-en-Y Gastric Bypass. Obesity Surgery
  Academic article
• Nymo, Siren; Lundanes, Julianne; Aukan, Marthe Isaksen; Sandvik, Jorunn; Johnsen, Gjermund; Græslie, Hallvard. (2022) Diet and physical activity are associated with suboptimal weight loss and weight regain 10–15 years after Roux-en-Y gastric bypass: A cross-sectional study. Obesity Research and Clinical Practice
  Academic article
• Sandvik, Elfrid Christine Smith; Aasarød, Kristin Matre; Johnsen, Gjermund; Hoff, Dag Arne Lihaug; Kulseng, Bård Eirik; Hyldmo, Åsne Ask. (2022) The Effect of Roux-en-Y Gastric Bypass on Non-Alcoholic Fatty Liver Disease Fibrosis Assessed by FIB-4 and NFS Scores—An 11.6-Year Follow-Up Study. Journal of Clinical Medicine
  Academic article
• Nymo, Siren; Lundanes, Julianne; Aukan, Marthe Isaksen; Sandvik, Jorunn; Johnsen, Gjermund; Græslie, Hallvard. (2022) Diet and physical activity are associated with suboptimal weight loss and weight regain 10–15 years after Roux-en-Y gastric bypass: A cross-sectional study. Obesity Research and Clinical Practice
  Academic article

2021

• Sandvik, Jorunn; Bjerkan, Kirsti Kverndokk; Græslie, Hallvard; Hoff, Dag Arne Lihaug; Johnsen, Gjermund; Kløckner, Christian. (2021) Iron Deficiency and Anemia 10 Years After Roux-en-Y Gastric Bypass for Severe Obesity. Frontiers in Endocrinology
  Academic article
• Strømmen, Magnus; Bakken, Inger Johanne Landsjøåsen; Kløckner, Christian; Sandvik, Jorunn; Kulseng, Bård Eirik; Holen, Are. (2021) Corrigendum to ‘Diagnoses Related to Abuse of Alcohol and Addictive Substances after Gastric Bypass and Sleeve Gastrectomy – A Nation-Wide Registry Study from Norway’. Surgery for Obesity and Related Diseases
  Errata
• Singhal, Rishi; Tahrani, Abd A.; Nasser, Sakran; Herrera, Miguel F.; Vinod, Menon; Khaitan, Manish. (2021) Effect of COVID-19 pandemic on global Bariatric surgery PRActiceS - The COBRAS study. Obesity Research and Clinical Practice
  Academic article
• Strømmen, Magnus; Kløckner, Christian; Bjerkan, Kirsti Kverndokk; Græslie, Hallvard; Hoff, Dag Arne Lihaug; Johnsen, Gjermund. (2021) Characteristics of Patients Reporting Presumed Problematic Drinking Behavior After Gastric Bypass: Exploring Long-Term Data From the BAROBS Study. Frontiers in Endocrinology
  Academic article
• Thorsen, Brit; Gjeilo, Kari Hanne; Sandvik, Jorunn; Follestad, Turid; Græslie, Hallvard; Nymo, Siren. (2021) Self-Reported Gastrointestinal Symptoms Two To Four Years After Bariatric Surgery. A Cross-Sectional Study Comparing Roux-en-Y Gastric Bypass and Laparoscopic Sleeve Gastrectomy. Obesity Surgery
  Academic article

2020

• Sandvik, Jorunn; Wibe, Arne; Kulseng, Bård Erik; Klöckner, Christian A.; Hole, Torstein. (2020) Long-term results after surgical treatment for severe obesity. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
  Doctoral dissertation
• Sandvik, Jorunn; Hole, Torstein; Kløckner, Christian; Kulseng, Bård Eirik; Wibe, Arne. (2020) The Impact of Post-bariatric Abdominoplasty on Secondary Weight Regain After Roux-en-Y Gastric Bypass. Frontiers in Endocrinology
  Academic article
• Sandvik, Jorunn. (2020) Operasjon eller livsstilsendring?. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Editorial
• Sandvik, Jorunn; Hole, Torstein; Kløckner, Christian; Kulseng, Bård Eirik; Wibe, Arne. (2020) Intravenous Iron Treatment in the Prevention of Iron Deficiency and Anaemia After Roux-en-Y Gastric Bypass. Obesity Surgery
  Academic article

2019

• Sandvik, Jorunn; Hole, Torstein; Kløckner, Christian; Kulseng, Bård Eirik; Wibe, Arne. (2019) Less secondary weight regain from nadir to five years among patients undergoing abdominoplasty after Roux-en-Y gastric bypass. Obesity Surgery
  Abstract
• Sandvik, Jorunn; Hole, Torstein; Kløckner, Christian; Kulseng, Bård Eirik; Wibe, Arne. (2019) Assessment of self-rated health 5 years after Roux-en-Y gastric bypass for severe obesity. BJS Open
  Academic article
• Nymo, Siren; Johnsen, Gjermund; Mårvik, Ronald; Græslie, Hallvard; Kulseng, Bård Eirik; Sandvik, Jorunn. (2019) Patient satisfaction more than ten years after Roux-en-Y gastric bypass. Obesity Surgery
  Abstract
• Strømmen, Magnus; Bakken, Inger Johanne Landsjøåsen; Kløckner, Christian; Sandvik, Jorunn; Kulseng, Bård Eirik; Holen, Are. (2019) Diagnoses related to abuse of alcohol and addictive substances after gastric bypass and sleeve gastrectomy: a nation-wide registry study from Norway. Surgery for Obesity and Related Diseases
  Academic article

2018

• Sandvik, Jorunn; Laurenius, Anna; Näslund, Ingmar; Videhult, Per; Wiren, Mikal; AASHEIM, ERLEND T.. (2018) Nordiske retningslinjer for oppfølging etter fedmekirurgi. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Reader opinion piece
• Laurenius, Anna; Näslund, Ingmar; Sandvik, Jorunn; Videhult, Per; Wiren, Mikal. (2018) Nordiska riktlinjer för kosttillskott och uppföljning efter obesitaskirurgi - Monitorering och supplementering med vitaminer och mineraler. Läkartidningen
  Academic article
• Sandvik, Jorunn; Hole, Torstein; Kløckner, Christian; Kulseng, Bård Eirik; Wibe, Arne. (2018) High-Frequency of Computer Tomography and Surgery for Abdominal Pain After Roux-en-Y Gastric Bypass. Obesity Surgery
  Academic article

2017

• Sandvik, Jorunn. (2017) Langtidsresultater etter Gastrisk Bypass og Gastrisk Sleeve. Kirurgen
  Article in business/trade/industry journal

2013

• Sandvik, Jorunn. (2013) Skal vi fortsette med overvektskirurgi?. Kirurgen
  Popular scientific article