Table 1.
Baseline characteristics of patients with Crohn's disease evaluated at the University of Maryland IBD Programme from July 2004 to April 2010 by age of diagnosis
| Variable | Overall (n = 467, n, %) | <17 years (n = 78; n, %) | 17–40 years (n = 312; n, %) | >40–59 years (n = 55; n, %) | ≥60 years (n = 22, n, %) | P-valuea |
|---|---|---|---|---|---|---|
| Sex | ||||||
| Male | 191 (41) | 36 (46) | 129 (41) | 20 (36) | 6 (27) | 0.38 |
| Race | ||||||
| White | 375 (80) | 22 (72) | 251 (80) | 48 (87) | 20 (91) | 0.07 |
| Family history | ||||||
| Yes | 130 (28) | 26 (33) | 94 (30) | 7 (13) | 3 (14) | 0.02 |
| Smoking history | ||||||
| Current | 111 (24) | 14 (18) | 78 (25) | 16 (29) | 3 (14) | 0.28 |
| Location | ||||||
| Ileal | 149 (34) | 15 (20) | 111 (38) | 19 (37) | 4 (20) | <0.01 |
| Colonic | 99 (23) | 15 (20) | 53 (18) | 20 (38) | 11 (55) | |
| Ileocolonic | 177 (42) | 44 (59) | 116 (40) | 13 (25) | 4 (20) | |
| Upper tractb | 63 (14) | 1 (1) | 9 (3) | 0 (0) | 1 (5) | |
| Behaviour | ||||||
| Inflammatory | 170 (36) | 20 (26) | 105 (34) | 31 (56) | 14 (64) | <0.01 |
| Stricturing | 141 (30) | 24 (31) | 96 (31) | 18 (33) | 3 (14) | |
| Penetrating | 156 (34) | 34 (43) | 111 (35) | 6 (11) | 5 (23) | |
| Perianalb | ||||||
| Yes | 149 (32) | 35 (45) | 101 (32) | 7 (13) | 6 (22) | <0.01 |
| Disease duration (mean years ± SD) | 13.7 ± 12.9 | 22.4 ± 10.1 | 13 ± 10.1 | 8.5 ± 7.7 | 5.5 ± 4.0 | <0.01 |
| Extraintestinal manifestation | ||||||
| Yes | 126 (27) | 21 (27) | 86 (28) | 15 (27) | 4 (18) | 0.82 |
SD, standard deviation.
aPearson Chi-square test.bUpper tract modifiers may co-exist with other location categories. Percentages reflect number of all patients with upper tract location.