All cases | Controls | Adjusted RR* | |
---|---|---|---|
(N=2,105) | (N=11,500) | (95%CI) | |
Non-use | 1,696 | 10,157 | 1 (reference) |
Current use (1-30) | 287 | 837 | 2.0 (1.7-2.3) |
Use within 1-7 | 259 | 771 | 2.0 (1.7-2.3) |
days time window | |||
Use within 8-30 | 28 | 66 | 2.3 (1.4-3.7) |
days time window | |||
Recent use (31-180) | 37 | 123 | 1.5 (1.0-2.3) |
Use within 31-60 | 14 | 45 | 1.7 (0.9-3.3) |
days time window | |||
Use within 61-180 | 23 | 78 | 1.5 (0.9-2.5) |
days time window | |||
Past use (>180) | 85 | 383 | 1.1 (0.8-1.4) |