Long-term effects of gastric bypass on quality of
life and bone mineral density
av
Mustafa Mohammed-Rafea Raoof
Akademisk avhandling
Avhandling för medicine doktorsexamen i Medicinsk vetenskap, med inriktning kirurgi,
som kommer att försvaras offentligt Fredagen den 29 Maj 2020 kl. 09.00,
Hörsal C3, Campus USÖ
Opponent: Prof. Tom Mala, M.D., Ph.D.
Department of Morbid Obesity and Bariatric Surgery and Department of Gastrointestinal Surgery
Oslo University Hospital, Oslo, Norway
Örebro universitet
Institutionen för Medicinska vetenskaper 701 82 ÖREBRO
Abstract
Mustafa Mohammed-Rafea Raoof (2020): Long-term effects of gastric bypass on quality of life and bone mineral density. Örebro Studies in Medicine 210.
Obesity is a worldwide disease. Surgery is currently the only available management option which offers an adequate long-term effect on comorbidity, quality-of-life and weight loss. It is evident that overweight and obesity are associated with low health-related quality-of-life (HRQoL) and multiple comorbidities. The aim of this thesis has been to explore the long-term effect of gastric bypass surgery on HRQoL and bone mineral density.
In study 1: 486 patients (average age 50.7±10.0 years, 84 % female)operated with gastric bypass (GBP) from 1993 to 2003 at the University Hospitals of Örebro and Upp-sala. Mean follow-up after GBP was 11.5±2.7 years (range 7–17). The study group was compared with two control groups. The study group scored better in the SF-36 domains and OP scale compared to obese controls, but their HRQoL scores were lower than those of the general population. HRQoL was better among younger patients and in the following subgroups: men; patients with satisfactory weight loss; those satisfied with the procedure; those free from comorbidity and gastrointestinal symptoms; employed; good oral status; and those not hospitalised or regularly followed up for non-bariatric reasons.
In study 3: Patients operated with a primary GBP between January 2008 and December 2012 were identified in the Scandinavian Obesity Surgery Register (SOReg). Patients with HRQoL data available at both baseline and 5 years after surgery were included. The study sample comprised 6998 patients (21% men). Gender differences in change in HRQoL were minor. Younger patients showed greater improvements in physical health scales. In general linear regression model analyses, age and weight loss correlated significantly with improve-ment in HRQoL after 5 years. Patients treated medically for depression preoperatively (13%) experienced less improvement in HRQoL than patients without such treatment. Patients with a postoperative complications (26%) had significantly less improvement in all aspects of HRQoL compared to those without any form of postoperative complication. This study confirmed the importance of weight loss for improvement in HRQoL after bar-iatric surgery. Preoperative medication for depression and suffering a complication during the five-year follow-up period were associated with less improvement in HRQoL.
Studies 2 and 4: Included patients operated with laparoscopic gastric bypass at the de-partment of surgery at the Örebro University Hospital between January 2004 and Decem-ber 2005. Thirty-two females were prospectively recruited for this longitudinal study. In both studies, the following were measured at baseline, 2, 5 and 10 years postoperatively: bone mineral density (BMD); weight; height; calcium; albumin; creatinine; S-25(OH)-vitamin D; and fP-PTH. In study 4: Nine of the patients declined follow-up. BMD showed a statistically significant decline over the study period. The fall in BMD of the spine and femoral neck between baseline and 5 years after surgery was 19% and 25%, respectively. During the next five years period BMD continued to decline but at a lower rate. At 5 years 58 % had elevated PTH, this number declined at the next 5 years.
Keywords: Gastric bypass; health related quality of life; RAND SF-36; obesity-related problems scale; bone mineral density; BMI; parathyroid hormone; obesity; vitamin D.
Mustafa M.-R. Raoof, School of Health and Medical Sciences Örebro University, SE-701 82 Örebro, Sweden
