Table 4.
Demography and characteristics of the study cohorts including male IBD patients following colectomy and a matched referent cohort from the general population.
| IBD subcohorts | ||||||
|---|---|---|---|---|---|---|
| Characteristics | Matched cohort [n = 19 502] | IBD-cohort [n = 3771] | UC [n = ,850] | CD [n = 321] | IBD-U [n = 1600] | |
| Age at diagnosis, years, mean [SD] | 26.34 [8.55] | 26.36 [8.58] | 27.64 [8.42] | 25.16 [8.32] | 25.11 [8.60] | |
| Age at colectomy, years, mean [SD] | 30.40 [8.12] | 30.41 [8.13] | 31.20 [7.99] | 29.18 [8.49] | 29.73 [8.14] | |
| Age at reconstruction, years, mean [SD] | 35.62 [12.27] | 35.62 [12.28] | 35.77 [11.86] | 36.91 [14.73] | 35.19 [12.20] | |
| Follow-up time, years, mean [SD] | 11.63 [7.12] | 11.34 [7.21] | 10.37 [6.76] | 13.90 [8.09] | 11.95 [7.33] | |
| Time to colectomy, years, mean [SD] | 4.06 [5.37] | 4.05 [5.38] | 3.57 [5.13] | 4.02 [5.74] | 4.61 [5.53] | |
| Time to reconstruction, years, mean [SD] | 5.22 [9.90] | 5.21 [9.90] | 4.56 [9.15] | 7.73 [13.60] | 5.46 [9.77] | |
| Age at first child, years, mean [SD] | 28.96 [5.44] | 29.29 [5.41] | 29.41 [5.32] | 28.11 [5.28] | 29.39 [5.52] | |
| Parity at diagnosis, mean [SD] | 0.63 [1.03] | 0.57 [0.97] | 0.64 [1.01] | 0.50 [0.91] | 0.51 [0.93] | |
| Parity at colectomy, mean [SD] | 0.88 [1.15] | 0.78 [1.07] | 0.83 [1.10] | 0.73 [1.04] | 0.74 [1.04] | |
| Achieved parity at end of follow-up, mean [SD] | 1.57 [1.31] | 1.38 [1.25] | 1.37 [1.26] | 1.38 [1.28] | 1.39 [1.23] | |
| No child at diagnosis, no. [%] | 12 993[66.6%] | 2594 [68.8%] | 1211 [65.5%] | 229 [71.3%] | 1154 [72.1%] | |
| No child at colectomy, no. [%] | 10 770 [55.2%] | 2210 [58.6%] | 1049 [56.7%] | 191 [59.5%] | 970 [60.6%] | |
| No child at end of follow-up, no. [proportion] | 5,799 [29.7%] | 1325 [35.1%] | 660 [35.7%] | 114 [35.5%] | 551 [34.4%] | |
| Year of colectomy, no. [%] | 1950–1979 | 2563 [13.1%] | 493 [13.1%] | 211 [11.4%] | 87 [27.1%] | 195 [12.2%] |
| 1980–1989 | 4330 [22.2%] | 835 [22.1%] | 382 [20.6%] | 115 [35.8%] | 338 [21.1%] | |
| 1990–1999 | 5387 [27.6%] | 1047 [27.8%] | 529 [28.6%] | 67 [20.9%] | 451 [28.2%] | |
| 2000–2009 | 4853 [24.9%] | 940 [24.9%] | 488 [26.4%] | 30 [9.3%] | 422 [26.4%] | |
| 2010–2014 | 2369 [12.1%] | 456 [12.1%] | 240 [13.0%] | 22 [6.9%] | 194 [12.1%] | |
Inflammatory bowel disease [IBD], ulcerative colitis [UC], Crohn’s disease [CD], IBD unclassified [IBD-U].