OC-005 Relative Risk(ORs) of Colorectal Cancer according to duration of previous low dose aspirin use in QResearch primary care database
| Duration of Aspirin use | Cases (%) (n = 6643) | Controls (%) (n = 20652) | Unadjusted odds ratio (95% CI) | Adjusted odds ratio (95% CI) | P-value |
|---|---|---|---|---|---|
| No use | 5071 (76.3) | 15718 (76.1) | 1.0 reference | 1.0 reference | |
| Up to 365 days | 417 (6.3) | 1152 (5.6) | 1.15 (1.02 to 1.30) | 1.12 (0.99 to 1.26) | 0.083 |
| 2 to 3 years | 380 (5.7) | 1166 (5.6) | 1.03 (0.91 to 1.17) | 0.97 (0.85 to 1.11) | 0.703 |
| 4 to 6 years | 378 (5.7) | 1193 (5.8) | 1.03 (0.91 to 1.16) | 0.96 (0.84 to 1.10) | 0.546 |
| 7 to 9 years | 233 (3.5) | 806 (3.9) | 0.94 (0.81 to 1.10) | 0.87 (0.73 to 1.02) | 0.094 |
| 10 to14 years | 164 (2.5) | 617 (3.0) | 0.90 (0.75 to 1.08) | 0.81 (0.66 to 0.98) | 0.033 |