Table 1.
Demographic and clinical characteristics of the immigrant and native-born IBD population in Spain.
| Immigrants | Natives | P -value | |
|---|---|---|---|
| (n = 1,864) | (n = 11,660) | ||
| Gender, female (n,%) | 936 (50.2) | 5444 (46.7) | 0.005 |
| Mean current age (SD) | 45.3 (12.6) | 54.5 (16.0) | <0.001 |
| Mean age at IBD diagnosis | 31.2 (12.0) | 36.5 (15.6) | <0.001 |
| Mean duration of disease (SD) | 14.0 (7.2) | 18.0 (8.7) | <0.001 |
| Smoking habit | |||
| no (n,%) | 1181 (69.3) | 6952 (59.5) | <0.001 |
| yes (n,%) | 296 (17.4) | 2227 (19.1) | |
| Ex (n,%) | 227 (13.3) | 2508 (21.5) | |
| Crohn's disease (n,%) | 777 (41.8) | 4755 (40.8) | 0.068 |
| Ulcerative colitis (n,%) | 1029 (55.4) | 6665 (57.2) | |
| Unclassified IBD (n,%) | 52 (2.8) | 240 (2.1) | |
| Crohn's age at diagnosis | |||
| A1 (<16y) (n,%) | 67 (8.6) | 275 (5.8) | <0.001 |
| A2 (16-40y) (n,%) | 586 (75.3) | 3223 (67.8) | |
| A3 (>40y) (n,%) | 125 (16.1) | 1257 (26.4) | |
| Crohn's location | |||
| L1 (ileal) (n,%) | 154 (28.5) | 1025 (28.4) | 0.368 |
| L2 (colonic) (n,%) | 112 (20.7) | 640 (17.7) | |
| L3 (ileocolonic) (n,%) | 233 (43.1) | 1636 (45.3) | |
| L4 (upper GI) (n,%) | 42 (7.8) | 308 (8.5) | |
| Crohn's behavior | |||
| B1 (inflammatory) | 482 (63.9) | 2744 (57.7) | 0.002 |
| B2 (stricturing) (n,%) | 144 (19.1) | 1158 (24.4) | |
| B3 (perforating) (n,%) | 128 (17.0) | 853 (17.9) | |
| Perianal perforating (n;%) | 242 (13.7) | 1776 (15.4) | 0.069 |
| Ulcerative colitis extent | |||
| Proctitis (n,%) | 186 (29.7) | 1478 (31.9) | 0.031 |
| Left sided colitis (n,%) | 357 (57.0) | 2689 (58.1) | |
| Extensive colitis (n,%) | 83 (13.3) | 459 (9.9) | |
| Extraintestinal manifestations (n;%) | 318 (18.9) | 1275 (10.9) | <0.001 |
| Family history of IBD (n,%) | 155 (9.4) | 1676 (14.3) | <0.001 |