Table 1.
Baseline characteristics of bariatric surgery patients and controls matched by age, sex, and body mass index. Data are no (%) of patients unless stated otherwise
| Characteristic | Bariatric surgery patients (n=2079) | Matched controls (n=10 442) |
|---|---|---|
| Follow-up time (years)* | 2.2 (2.1) | 2.3 (2.2) |
| Female patients | 1744 (83.9) | 8904 (85.3) |
| Age at index date (years)* | 44.6 (11.1) | 44.9 (11.2) |
| Body mass index at index date* | 43.2 (7.2) | 40.8 (6.4) |
| Smoking status | ||
| Never | 1092 (52.5) | 5957 (57.0) |
| Current | 377 (18.1) | 2293 (22.0) |
| Ex-smoker | 591 (28.4) | 2100 (20.1) |
| Unknown | 19 (0.9) | 92 (0.9) |
| Falls (within previous 6-12 months) | 22 (1.1) | 58 (0.6) |
| History of disease ever before | ||
| Fracture | 407 (19.6) | 1876 (18.0) |
| Rheumatoid arthritis | 30 (1.4) | 120 (1.1) |
| Cerebrovascular disease | 37 (1.8) | 156 (1.5) |
| Drug use within previous 6 months | ||
| Glucocorticoids | 89 (4.3) | 370 (3.5) |
| Calcium or vitamin D supplements | 104 (5.0) | 174 (1.7) |
| Antiobesity drugs | 248 (11.9) | 576 (5.5) |
| Antidiabetics | 401 (19.3) | 1102 (10.6) |
| Antidepressants | 697 (33.5) | 2050 (19.6) |
| Anxiolytics or hypnotics | 203 (9.8) | 574 (5.5) |
| Bisphosphonates | 8 (0.4) | 68 (0.7) |
| Hormone replacement therapy | 90 (4.3) | 271 (2.6) |
| Proton pump inhibitors | 503 (24.2) | 1315 (12.6) |
*Data are mean (standard deviation).