Characteristics of patients in primary care aged 18–49 years with CRC and IBD cases and matched controls
| Age, years | CRC | IBD | ||||||
|---|---|---|---|---|---|---|---|---|
| Cases n = 1661 | Controls n= 3979 | Cases n= 9578 | Controls n = 22 947 | |||||
| Total | Females n= 806 | Males n= 855 | Total | Females n= 4976 | Males n= 4602 | |||
| 18–29, n (%) | 58 (3.5) | 32 (4.0) | 26 (3.0) | 145 (3.6) | 2934 (30.6) | 1518 (30.5) | 1416 (30.8) | 6964 (30.4) |
| 30–39, n (%) | 224 (13.5) | 112 (13.9) | 112 (13.1) | 528 (13.3) | 3033 (31.7) | 1634 (32.8) | 1399 (30.4) | 7251 (31.6) |
| 40–49, n (%) | 1379 (83) | 662 (82.1) | 717 (83.9) | 3306 (83.1) | 3611 (37.7) | 1824 (36.7) | 1787 (38.8) | 8732 (38) |
| Mean number (SD) of consultations to primary care | ||||||||
|---|---|---|---|---|---|---|---|---|
| CRC | IBD | |||||||
| Cases n= 1661 | Controls n= 3979 | Cases n= 9578 | Controls n = 22 947 | |||||
| Males n = 855 | Females n = 806 | Males n = 1828 | Females n = 2151 | Males n = 4602 | Females n = 4976 | Males n = 9616 | Females n = 13 331 | |
| 1 year before diagnosis | 12.1 (8.5) | 15 (9.7) | 5.8 (6.2) | 8.3 (8.1) | 12.3 (10.2) | 16.4 (11) | 5.2 (6.1) | 8.2 (7.8) |
| 6 months before diagnosis | 9 (5.9) | 10.5 (6.5) | 3.3 (3.4) | 4.5 (4.5) | 8.4 (6.3) | 10.2 (6.8) | 3.1 (3.4) | 4.3 (4.2) |
CRC = colorectal cancer. IBD = inflammatory bowel disease.