Table 1.
Demographic characteristics of cases and controls
| Cases |
Controls |
|
|---|---|---|
|
n (%) |
n (%) |
|
| N = 20 193 | 201,393 | |
| Gender | ||
| Male | 9743 (48) | 97,159 (48) |
| Female | 10,450 (52) | 104,234 (52) |
| Age (years) | ||
| 0–9 | 156 (0.8) | 2225 (1.1) |
| 10–19 | 1405 (7.0) | 14,532 (7.2) |
| 20–29 | 2883 (14.3) | 26,935 (13.4) |
| 30–39 | 3478 (17.2) | 34,856 (17.3) |
| 40–49 | 3256 (16.1) | 33,268 (16.5) |
| 50–59 | 3082 (15.3) | 31,021 (15.4) |
| 60–69 | 2818 (14.0) | 27,880 (13.8) |
| 70–79 | 2114 (10.5) | 21,076 (10.5) |
| 80–89 | 911 (4.5) | 8834 (4.4) |
| 90+ | 87 (0.4) | 766 (0.4) |
| UC | 10,679 (52.9) | |
| Crohn’s | 7435 (36.8) | |
| Indeterminate IBD | 2079 (10.3) | |
| Psychiatric condition | 5085 (25.2) | 42,990 (21.4) |
| Ever smoker | 10,152 (50.3) | 87,538 (43.5) |
| Median follow-up (years) (interquartile range) | 5.23 (2.13, 9.28) | 5.22 (2.15, 9.27) |
UC: ulcerative colitis; IBD: inflammatory bowel disease.