Risk of colorectal cancer (CRC) and type and duration of inflammatory bowel disease (IBD)
| Characteristic | Cases (n = 100) | Controls (n = 600) | Crude OR (95% CI) |
|---|---|---|---|
| *Type of IBD was not specified by the general practitioner for a small number of patients. | |||
| †Based on the time period between the date of the first IBD recording or 5-aminosalicylate prescribing and the index date. | |||
| UC, ulcerative colitis; CD, Crohn’s disease; OR (95% CI), odds ratio (95% confidence interval). | |||
| Type of IBD* | |||
| CD | 15 | 117 | Reference |
| UC | 76 | 399 | 2.86 (1.22–6.72) |
| Duration of UC† | |||
| 0–2 y | 13 | 77 | Reference |
| 2–10 y | 23 | 177 | 1.08 (0.52–2.27) |
| >10 y | 40 | 145 | 2.12 (1.07–4.19) |
| Duration of CD† | |||
| 0–2 y | 2 | 31 | Reference |
| 2–10 y | 5 | 59 | 1.56 (0.49–4.93) |
| >10 y | 8 | 27 | 3.16 (1.15–8.68) |