Table 1.
Baseline characteristics of groups. Values are numbers (percentages) unless stated otherwise
| Characteristics | Bariatric (n=12 676) | Obese (n=38 028) | Non-obese (n=126 760) | P value* |
|---|---|---|---|---|
| Women | 9169 (72.3) | 27 507 (72.3) | 91 680 (72.3) | 1.00 |
| Mean (SD) age, years | 42.6 (11) | 42.7 (11) | 42.6 (11) | 0.22 |
| Area of residence: | ||||
| Montreal census metropolitan area | 4653 (36.7) | 20 647 (54.3) | 59 363 (46.8) | <0.001 |
| Other census metropolitan area (≥100 000 inhabitants) | 2556 (20.2) | 8697 (22.9) | 25 672 (20.3) | |
| Census agglomeration areas (between 10 000 and 100 000 inhabitants) | 2472 (19.5) | 3557 (9.4) | 15 063 (11.9) | |
| Small towns and rural areas | 2926 (23.1) | 4994 (13.1) | 25 527 (20.1) | |
| Missing | 69 (0.5) | 133 (0.3) | 1135 (0.9) | |
| Fifth of material deprivation†: | ||||
| 1 (more privileged) | 1566 (12.4) | 7562 (19.9) | 25 473 (20.1) | <0.001 |
| 2 | 2308 (18.2) | 8209 (21.6) | 25 417 (20.1) | |
| 3 | 2578 (20.3) | 7867 (20.7) | 24 402 (19.3) | |
| 4 | 2839 (22.4) | 7265 (19.1) | 23 883 (18.8) | |
| 5 (more disadvantaged) | 2920 (23.0) | 5937 (15.6) | 22 570 (17.8) | |
| Missing | 465 (3.7) | 1188 (3.1) | 5015 (4.0) | |
| Fifth of social deprivation†: | ||||
| 1 (more privileged) | 2362 (18.6) | 7809 (20.5) | 25 342 (20.0) | <0.001 |
| 2 | 2408 (19.0) | 7483 (19.7) | 25 369 (20.0) | |
| 3 | 2548 (20.1) | 7444 (19.6) | 24 580 (19.4) | |
| 4 | 2408 (19.0) | 7337 (19.3) | 23 614 (18.6) | |
| 5 (more disadvantaged) | 2485 (19.6) | 6767 (17.8) | 22 840 (18.0) | |
| Missing | 465 (3.7) | 1188 (3.1) | 5015 (4.0) | |
| History of fracture (before index date) | 1326 (10.5) | 3065 (8.1) | 8329 (6.6) | <0.001 |
| No of comorbidities‡: | ||||
| None | 3886 (30.7) | 20 549 (54.0) | 86 039 (67.9) | <0.001 |
| 1-2 | 6949 (54.8) | 15 455 (40.6) | 37 785 (29.8) | |
| ≥3 | 1841 (14.5) | 2024 (5.3) | 2936 (2.3) | |
| Type of comorbidities (most prevalent)‡: | ||||
| Cardiovascular disease§ | 873 (6.9) | 1389 (3.7) | 2921 (2.3) | <0.001 |
| Hypertension | 3757 (29.6) | 5798 (15.2) | 9411 (7.4) | <0.001 |
| Chronic pulmonary disease | 2452 (19.3) | 4136 (10.9) | 7867 (6.2) | <0.001 |
| Diabetes | 3950 (31.2) | 3129 (8.2) | 4117 (3.2) | <0.001 |
| Hypothyroidism | 799 (6.3) | 2080 (5.5) | 4488 (3.5) | <0.001 |
| Renal failure | 157 (1.2) | 131 (0.3) | 280 (0.2) | <0.001 |
| Depression | 2775 (21.9) | 5542 (14.6) | 12 650 (10.0) | <0.001 |
| Osteoporosis | 65 (0.5) | 485 (1.3) | 1819 (1.4) | <0.001 |
*For difference between groups, using χ2 test for age and sex and univariate conditional multinomial regression for other characteristics.
†Based on six socioeconomic indicators: education level, employment rate, average income of population, living status (alone or not), marital status, and proportion of single parent families in population.
‡In previous five years.
§Includes heart failure, cardiac arrhythmias, valvular disease, pulmonary circulation disorders, and peripheral vascular disorders.