Table 1:
Patient characteristics at the time of inflammatory bowel disease diagnosis and their matched general population controls, 2007–2016
| Cases n=23,982# |
Controls n=117,827 |
||
|---|---|---|---|
| Ulcerative colitis n=15,951 |
Crohn’s disease n=7,898 |
||
| Age, years | 36 [24–56] | 31 [19–51] | 35 [22–54] |
| <18 | 1,755 (11) | 1,686 (21) | 17,699 (15) |
| 18–24 | 2,552 (16) | 1,422 (18) | 20,421 (17) |
| 25–34 | 3,190 (20) | 1,343 (17) | 22,785 (19) |
| 35–44 | 2,233 (14) | 948 (12) | 15,843 (13) |
| 45–54 | 1,914 (12) | 790 (10) | 13,451 (12) |
| 55–64 | 2,072 (13) | 869 (11) | 13,487 (12) |
| ≥65 | 2,235 (14) | 840 (11) | 14,141 (12) |
| Male sex, n (%) | 8,543 (54) | 3,997 (51) | 62,010 (52) |
| Region of residence, n (%) | |||
| Northern Sweden | 1,417 (9) | 590 (7) | 9,926 (8) |
| Southeastern Sweden | 1,816 (11) | 923 (12) | 13,572 (12) |
| Southern Sweden | 3,030 (19) | 1,518 (19) | 22,390 (19) |
| Stockholm-Gotland | 3,071 (19) | 2,047 (26) | 25,229 (21) |
| Uppsala-Örebro | 3,489 (22) | 1,592 (20) | 25,216 (21) |
| Western Sweden | 3,026 (19) | 1,178 (15) | 20,922 (18) |
| Unknown | 102 (1) | 50 (1) | 572 (1) |
| Education, n (%) | |||
| ≤9 years | 2,829 (18) | 1,540 (20) | 21,030 (18) |
| 10–12 years | 7,121 (45) | 3,473 (44) | 50,542 (43) |
| ≥13 years | 5,563 (35) | 2,430 (31) | 41,092 (35) |
| Unknown | 438 (3) | 455 (6) | 5,163 (4) |
| Number of encounters*, n | |||
| Inpatient | 2 [0–4] | 2 [0–4] | 1 [0–3] |
| Outpatient | 5 [2–11] | 6 [2–13] | 3 [1–9] |
| Calendar year | |||
| 2007–2009 | 4,786 (30) | 2,186 (28) | 34,449 (29) |
| 2010–2013 | 7,031 (44) | 3,570 (45) | 52,373 (44) |
| 2014–2016 | 4,134 (26) | 2,142 (27) | 31,005 (26) |
Values are median [IQR] or absolute figures (percentages). Polytomous variables may not sum to 100% due to rounding.
#
includes ulcerative colitis, Crohn’s disease, and IBD-unclassified
*
calculated the number of inpatient and outpatient encounters (continuous) for each participant during the study period up until the time of matching/case diagnosis.