Table 1 Number of patients with complete follow up and lost to follow up according to disease phenotype at diagnosis and place of residence.
| Total No of patients (n = 358) | Total | Complete follow up | Lost to follow up | |
|---|---|---|---|---|
| Lost during course | Dead | |||
| Age at diagnosis | ||||
| ⩽40 y | 241 | 206 (86) | 32 (13) | 3 (1) |
| ⩾40 y | 117 | 76 (65) | 8 (7) | 33 (28) |
| Disease location at diagnosis | ||||
| Terminal ileum | 53 | 45 (85) | 5 (9) | 3 (6) |
| Colon | 151 | 112 (74) | 18 (12) | 21 (14) |
| Ileocolon | 134 | 110 (82) | 14 (10) | 10 (8) |
| Upper gastrointestinal | 20 | 15 (75) | 3 (15) | 2 (10) |
| Disease behaviour at diagnosis | ||||
| Inflammatory | 264 | 207 (78) | 29 (11) | 28 (11) |
| Stricturing | 57 | 47 (82) | 4 (7) | 6 (11) |
| Penetrating | 30 | 23 (77) | 5 (17) | 2 (6) |
| Stricturing and penetrating | 7 | 5 (71) | 2 (19) | 0 |
| Residence | ||||
| Almada, Portugal | 9 | 5 (55) | 4 (45) | 0 |
| Beer Sheeva, Israel | 20 | 15 (75) | 4 (20) | 1 (5) |
| Copenhagen, Denmark | 58 | 42 (72) | 6 (10) | 10 (18) |
| Cremona, Italy | 9 | 8 (89) | 0 | 1 (11) |
| Ioannina, Greece | 6 | 4 (66) | 1 (17) | 1 (17) |
| Heraklion, Greece | 15 | 8 (53) | 4 (27) | 3 (20) |
| Oslo, Norway | 103 | 85 (82) | 8 (8) | 10 (10) |
| Reggio Emilia, Italy | 32 | 24 (75) | 5 (16) | 3 (9) |
| South Limburg, the Netherlands | 77 | 66 (86) | 7 (9) | 4 (5) |
| Vigo, Spain | 30 | 25 (83) | 2 (7) | 3 (10) |
Values are number (percentage of total).