Table 5.
Relative risks of fracture by type of bariatric procedure (for period between 2006 and 2014)
| Groups | Period before surgery (or index date) | Period after surgery (or index date) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| No (%) with fractures | Unadjusted RR (95% CI) | Adjusted RR* (95% CI) | P value | No (%) with fractures | Unadjusted RR (95% CI) | Adjusted RR* (95% CI) | P value | ||
| Adjustable gastric banding (n=3887) | 467 (12.0) | 1.83 (1.65 to 2.04) | 1.50 (1.34 to 1.68) | <0.001 | 80 (2.1) | 1.43 (1.10 to 1.86) | 1.08 (0.83 to 1.39) | 0.58 | |
| Sleeve gastrectomy (n=2554) | 310 (12.1) | 1.50 (1.32 to 1.71) | 1.16 (1.01 to 1.33) | 0.04 | 35 (1.4) | 1.76 (1.17 to 2.64) | 1.27 (0.86 to 1.88) | 0.23 | |
| Roux-en-Y gastric bypass (n=873) | 99 (11.3) | 1.64 (1.32 to 2.04) | 1.17 (0.91 to 1.51) | 0.23 | 23 (2.6) | 1.54 (0.96 to 2.46) | 1.13 (0.67 to 1.92) | 0.65 | |
| Biliopancreatic diversion (n=1986) | 212 (10.7) | 1.61 (1.38 to 1.88) | 1.20 (1.01 to 1.42) | 0.04 | 94 (4.7) | 2.26 (1.81 to 2.83) | 1.60 (1.25 to 2.03) | <0.001 | |
| Obese group (n=27 900) | 2463 (8.8) | 1.20 (1.14 to 1.26) | 1.18 (1.12 to 1.24) | <0.001 | 514 (1.8) | 1.21 (1.09 to 1.34) | 1.12 (1.00 to 1.25) | 0.004 | |
| Non-obese group (n=93 000) | 6798 (7.3) | Reference | Reference | 1422 (1.5) | Reference | Reference | |||
RR=relative risk.
*Adjusted for duration of follow-up, material and social deprivation, area of residence, history of fracture (period after index date only), and number of comorbidities in previous five years, using multivariate conditional Poisson regression model.