Publications 2024

Drabløs M, Risstad H, Alnæs-Katjavivi P, Qvigstad E (2024)
Pregnancy outcomes in type 2 versus type 1 diabetes: systematic review with meta-analyses
Endocr Connect, 13 (12)
DOI 10.1530/EC-24-0066, PubMed 39441788

Salte OBK, Olbers T, Risstad H, Fagerland MW, Søvik TT, Blom-Høgestøl IK, Kristinsson JA, Engström M, Mala T (2024)
Ten-Year Outcomes Following Roux-en-Y Gastric Bypass vs Duodenal Switch for High Body Mass Index: A Randomized Clinical Trial
JAMA Netw Open, 7 (6), e2414340
DOI 10.1001/jamanetworkopen.2024.14340, PubMed 38829616

Publications 2021

Langslet G, Johansen AK, Bogsrud MP, Narverud I, Risstad H, Retterstøl K, Holven KB (2021)
Thirty percent of children and young adults with familial hypercholesterolemia treated with statins have adherence issues
Am J Prev Cardiol, 6, 100180
DOI 10.1016/j.ajpc.2021.100180, PubMed 34327501

Salte OBK, Svanevik M, Risstad H, Hofsø D, Blom-Høgestøl IK, Johnson LK, Fagerland MW, Kristinsson J, Hjelmesæth J, Mala T, Sandbu R (2021)
Standard versus distal Roux-en-Y gastric bypass in patients with BMI 50-60 kg/m2: 5-year outcomes of a double-blind, randomized clinical trial
BJS Open, 5 (6)
DOI 10.1093/bjsopen/zrab105, PubMed 34791048

Publications 2020

Chahal-Kummen M, Salte OBK, Hewitt S, Blom-Høgestøl IK, Risstad H, Kristinsson J, Mala T (2020)
Health benefits and risks during 10 years after Roux-en-Y gastric bypass
Surg Endosc, 34 (12), 5368-5376
DOI 10.1007/s00464-019-07328-2, PubMed 31993812

Publications 2019

Hanvold SE, Vinknes KJ, Løken EB, Hjartåker A, Klungsøyr O, Birkeland E, Risstad H, Gulseth HL, Refsum H, Aas AM (2019)
Does Lifestyle Intervention After Gastric Bypass Surgery Prevent Weight Regain? A Randomized Clinical Trial
Obes Surg, 29 (11), 3419-3431
DOI 10.1007/s11695-019-04109-7, PubMed 31363961

Salte OB, Sovik TT, Risstad H, Skattum J, Blom-Hogestol IK, Eribe IEL, Kristinsson JA, Mala T (2019)
Bariatric surgery at Oslo University Hospital 2004-14
Tidsskr. Nor. Laegeforen., 139 (10), 921-926

Salte OB, Søvik TT, Risstad H, Skattum J, Blom-Høgestøl IK, Eribe IEL, Kristinsson JA, Mala T (2019)
[Bariatric surgery at Oslo University Hospital 2004–14]
Tidsskr Nor Laegeforen, 139 (10)
DOI 10.4045/tidsskr.18.0495, PubMed 31238674

Svanevik M, Risstad H, Hofsø D, Blom-Høgestøl IK, Kristinsson JA, Sandbu R, Småstuen MC, Thorsby PM, Mala T, Hjelmesæth J (2019)
Bone Turnover Markers After Standard and Distal Roux-en-Y Gastric Bypass: Results from a Randomized Controlled Trial
Obes Surg, 29 (9), 2886-2895
DOI 10.1007/s11695-019-03909-1, PubMed 31065919

Publications 2018

Engebretsen KV, Blom-Høgestøl IK, Hewitt S, Risstad H, Moum B, Kristinsson JA, Mala T (2018)
Anemia following Roux-en-Y gastric bypass for morbid obesity; a 5-year follow-up study
Scand J Gastroenterol, 53 (8), 917-922
DOI 10.1080/00365521.2018.1489892, PubMed 30231804

Svanevik M, Risstad H, Karlsen TI, Kristinsson JA, Småstuen MC, Kolotkin RL, Søvik TT, Sandbu R, Mala T, Hjelmesæth J (2018)
Patient-Reported Outcome Measures 2 Years After Standard and Distal Gastric Bypass-a Double-Blind Randomized Controlled Trial
Obes Surg, 28 (3), 606-614
DOI 10.1007/s11695-017-2891-3, PubMed 28865057

Publications 2017

Risstad H, Kristinsson JA, Fagerland MW, le Roux CW, Birkeland KI, Gulseth HL, Thorsby PM, Vincent RP, Engström M, Olbers T, Mala T (2017)
Bile acid profiles over 5 years after gastric bypass and duodenal switch: results from a randomized clinical trial
Surg Obes Relat Dis, 13 (9), 1544-1553
DOI 10.1016/j.soard.2017.05.024, PubMed 28756050

Publications 2016

Morseth MS, Hanvold SE, Rø Ø, Risstad H, Mala T, Benth JŠ, Engström M, Olbers T, Henjum S (2016)
Self-Reported Eating Disorder Symptoms Before and After Gastric Bypass and Duodenal Switch for Super Obesity--a 5-Year Follow-Up Study
Obes Surg, 26 (3), 588-94
DOI 10.1007/s11695-015-1790-8, PubMed 26173850

Qvigstad E, Gulseth HL, Risstad H, le Roux CW, Berg TJ, Mala T, Kristinsson JA (2016)
A novel technique of Roux-en-Y gastric bypass reversal for postprandial hyperinsulinemic hypoglycaemia: A case report
Int J Surg Case Rep, 21, 91-4
DOI 10.1016/j.ijscr.2016.02.033, PubMed 26957187

Risstad H, Svanevik M, Kristinsson JA, Hjelmesæth J, Aasheim ET, Hofsø D, Søvik TT, Karlsen TI, Fagerland MW, Sandbu R, Mala T (2016)
Standard vs Distal Roux-en-Y Gastric Bypass in Patients With Body Mass Index 50 to 60: A Double-blind, Randomized Clinical Trial
JAMA Surg, 151 (12), 1146-1155
DOI 10.1001/jamasurg.2016.2798, PubMed 27626242

Publications 2015

Bergh I, Kvalem IL, Risstad H, Cameron LD, Sniehotta FF (2015)
Predictors of Preoperative Weight Loss in Morbidly Obese Adults Waiting for Bariatric Surgery: A Prospective Cohort Study
Obes Surg, 25 (9), 1610-7
DOI 10.1007/s11695-015-1569-y, PubMed 25616397

Bergh I, Lundin Kvalem I, Risstad H, Sniehotta FF (2015)
Preoperative predictors of adherence to dietary and physical activity recommendations and weight loss one year after surgery
Surg Obes Relat Dis, 12 (4), 910-918
DOI 10.1016/j.soard.2015.11.009, PubMed 26965158

Mala T, Hewitt S, Høgestøl IK, Kjellevold K, Kristinsson JA, Risstad H (2015)
[Dumping syndrome following gastric surgery]
Tidsskr Nor Laegeforen, 135 (2), 137-41
DOI 10.4045/tidsskr.14.0550, PubMed 25625992

Mala T, Hewitt S, Høgestøl IK, Kjellevold K, Kristinsson JA, Risstad H (2015)
[Dumping syndrome following gastric surgery]
Tidsskr Nor Laegeforen, 135 (4), 310
DOI 10.4045/tidsskr.15.0163, PubMed 25707648

Risstad H, Søvik TT, Engström M, Aasheim ET, Fagerland MW, Olsén MF, Kristinsson JA, le Roux CW, Bøhmer T, Birkeland KI, Mala T, Olbers T (2015)
Five-year outcomes after laparoscopic gastric bypass and laparoscopic duodenal switch in patients with body mass index of 50 to 60: a randomized clinical trial
JAMA Surg, 150 (4), 352-61
DOI 10.1001/jamasurg.2014.3579, PubMed 25650964

Risstad H, Søvik TT, Hewitt S, Kristinsson JA, Fagerland MW, Bernklev T, Mala T (2015)
Changes in Health-Related Quality of Life After Gastric Bypass in Patients With and Without Obesity-Related Disease
Obes Surg, 25 (12), 2408-16
DOI 10.1007/s11695-015-1717-4, PubMed 26003550

Svanevik M, Risstad H, Hofsø D, Schou CF, Solheim B, Søvik TT, Kristinsson J, Hjelmesæth J, Mala T, Sandbu R (2015)
Perioperative Outcomes of Proximal and Distal Gastric Bypass in Patients with BMI Ranged 50-60 kg/m(2)--A Double-Blind, Randomized Controlled Trial
Obes Surg, 25 (10), 1788-95
DOI 10.1007/s11695-015-1621-y, PubMed 25761943

Aaseth E, Fagerland MW, Aas AM, Hewitt S, Risstad H, Kristinsson J, Bøhmer T, Mala T, Aasheim ET (2015)
Vitamin concentrations 5 years after gastric bypass
Eur J Clin Nutr, 69 (11), 1249-55
DOI 10.1038/ejcn.2015.82, PubMed 26081488

Publications 2014

Gulseth HL, Risstad H, Birkeland KI (2014)
Bariatric surgery versus intensive medical therapy for diabetes
N Engl J Med, 371 (7), 681
DOI 10.1056/NEJMc1407393, PubMed 25119618

Hewitt S, Humerfelt S, Søvik TT, Aasheim ET, Risstad H, Kristinsson J, Mala T (2014)
Long-term improvements in pulmonary function 5 years after bariatric surgery
Obes Surg, 24 (5), 705-11
DOI 10.1007/s11695-013-1159-9, PubMed 24435516

Publications 2013

Aftab H, Risstad H, Søvik TT, Bernklev T, Hewitt S, Kristinsson JA, Mala T (2013)
Five-year outcome after gastric bypass for morbid obesity in a Norwegian cohort
Surg Obes Relat Dis, 10 (1), 71-8
DOI 10.1016/j.soard.2013.05.003, PubMed 24182445

Miras AD, Risstad H, Baqai N, Law S, Søvik TT, Mala T, Olbers T, Kristinsson JA, le Roux CW (2013)
Application of the International Diabetes Federation and American Diabetes Association criteria in the assessment of metabolic control after bariatric surgery
Diabetes Obes Metab, 16 (1), 86-9
DOI 10.1111/dom.12177, PubMed 23841525