Abstract
OBJECTIVE: Type 2 diabetes and obesity are associated with reduced health-related quality of life (HRQoL) and health utility (HU), but long-term effects of metabolic/bariatric surgery (MBS) compared with those of medical/lifestyle intervention (MLI) on these outcomes are unclear. RESEARCH DESIGN AND METHODS: We studied 228 individuals with type 2 diabetes and obesity randomly assigned to MBS (Roux-en-Y gastric bypass, sleeve gastrectomy, or gastric band; n = 152) or MLI (n = 76) in the ARMMS-T2D study. HRQoL (36-Item Short-Form Health Survey [SF-36], including Physical Component Score [PCS] and Mental Component Score [MCS]) and HU (Short Form 6 Dimensions [SF-6D]) were measured annually up to 12 years. RESULTS: At baseline, participants' mean ± SD age was 49.2 ± 8.0 years, 68.4% were female, BMI was 36.3 ± 3.4 kg/m2, and HbA1c was 8.7 ± 1.6%. PCS improved significantly more in the MBS versus MLI group over 12 years (+2.37 ± 0.53 vs. -0.95 ± 0.73; difference 3.32 ± 0.85; P < 0.001). MBS was associated with better general health (P < 0.001), physical functioning (P = 0.001), and vitality (P = 0.003). Reduction in BMI was greater after MBS versus MLI (P < 0.001) and correlated with improved PCS (r = -0.43; P < 0.001). Change in PCS was not associated with change in HbA1c. MCS changed minimally from baseline and was similar between MBS and MLI groups during follow-up (-0.21 ± 0.61 vs. -0.89 ± 0.84; difference 0.68 ± 0.97; P = 0.48). Improvements in HU were greater in the MBS versus MLI group over 12 years (+0.02 ± 0.01 vs. -0.01 ± 0.01; difference 0.03 ± 0.01; P = 0.003). CONCLUSIONS: Metabolic surgery produces sustained weight loss and improves PCS, general health, physical functioning, vitality, and HU in individuals with type 2 diabetes and obesity compared with medical therapy up to 12 years after intervention.