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Pros and cons of gastric bypass surgery in individuals with obesity and type 2 diabetes: Nationwide, matched, observational cohort study

Artikel i vetenskaplig tidskrift
Författare Vasileios Liakopoulos
Stefan Franzén
Ann-Marie Svensson
Mervete Miftaraj
Johan Ottosson
Ingmar Näslund
Soffia Gudbjörnsdottir
Björn Eliasson
Publicerad i BMJ Open
Volym 9
Nummer/häfte 1
Publiceringsår 2019
Publicerad vid Wallenberglaboratoriet
Institutionen för medicin
Institutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition
Institutionen för medicin, avdelningen för molekylär och klinisk medicin
Språk en
Länkar https://doi.org/10.1136/bmjopen-201...
Ämnesord adverse effects, bariatric surgery, diabetes mellitus, obesity, postoperative complications
Ämneskategorier Diabetologi


© Author(s) (or their employer(s)) 2019. Objectives: Long-term effects of gastric bypass (GBP) surgery have been presented in observational and randomised studies, but there are only limited data for persons with obesity and type 2 diabetes mellitus (T2DM) regarding postoperative complications. Design: This is a nationwide observational study based on two quality registers in Sweden (National Diabetes Register, NDR and Scandinavian Obesity Surgery Register, SOReg) and other national databases. Setting: After merging the data, we matched individuals with T2DM who had undergone GBP with those not surgically treated for obesity on propensity score, based on sex, age, body mass index (BMI) and calendar time. The risks of postoperative outcomes (rehospitalisations) were assessed using Cox regression models. Participants: We identified 5321 patients with T2DM in the SOReg and 5321 matched controls in the NDR, aged 18-65 years, with BMI >27.5 kg/m 2 ; and followed for up to 9 years. Primary and secondary outcome measures: We assessed risks for all-cause mortality and hospitalisations for cardiovascular disease, severe kidney disease, along with surgical and other medical conditions. Results: The results agree with the previously suggested lower risks of all-cause mortality (49%) and cardiovascular disease (34%), and we also found positive effects for severe kidney disease but significantly increased risks (twofold to ninefold) of several short-term complications after GBP, such as abdominal pain and gastrointestinal conditions, frequently requiring surgical procedures, apart from reconstructive plastic surgery. Long-term, the risk of anaemia was 92% higher, malnutrition developed approximately three times as often, psychiatric diagnoses were 33% more frequent and alcohol abuse was three times as great as in the control group. Conclusions: This nationwide study confirms the benefits and describes the panorama of adverse events after bariatric surgery in persons with obesity and T2DM. Long-term postoperative monitoring and support, as better selection of patients by appropriate specialists in interdisciplinary settings, should be provided to optimise the outcomes.

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