Long-term incidence of serious fall-related injuries after bariatric surgery in Swedish Obese Subjects

Obesity increases risk of falling, but the effect of bariatric surgery on fall-related injuries is unknown. The aim of this study was therefore to study the association between bariatric surgery and long-term incidence of fall-related injuries in the prospective, controlled Swedish Obese Subjects study. At inclusion, body-mass index was ≥34 kg/m(2) in men and ≥38 kg/m(2) in women. The surgery per-protocol group (n=2007) underwent gastric bypass (n=266), banding (n=376) or vertical banded gastroplasty (n=1365), and controls (n=2040) received usual care. At the time of analysis (December 31, 2013), median follow-up was 19 years (maximal 26 years). Fall-related injuries requiring hospital treatment were captured using data from the Swedish National Patient Register. During follow-up, there were 617 first-time fall-related injuries in the surgery group and 513 in the control group (adjusted hazard ratio (adjHR 1.21, 95% CI, 1.07 to 1.36; P=0.002). The incidence differed between treatment groups (P<0.001, log-rank test) and was higher after gastric bypass than after usual care, banding and vertical banded gastroplasty (adjHRs 0.50-0.52, P<0.001 for all three comparisons). In conclusion, gastric bypass surgery was associated with increased risk of serious fall-related injury requiring hospital treatment.