Table 2 Risk of breast cancer associated with HRT: Ever- use of HRT use vs. never use analyzed with conditional logistic regression by increasing lag-time (index dates).
From: Breast cancer risk associated with different HRT formulations: a register-based case-control study
Breast cancer | Â | Conditional logistic regressions by index dates: OR (95% CI) | ||||
|---|---|---|---|---|---|---|
| Â | Â | No index date | 0.5 | 2.0 | 4.0 | 6.0 |
|  | Crude | 1.1 (0.99–1.2) | 1.1 (0.99–1.2) | 1.1 (0.99–1.2) | 1.2 (1.0–1.3) | 1.2 (1.0–1.3) |
|  | Adjusted | 1.2 (1.1–1.3) | 1.2 (1.0–1.3) | 1.2 (1.0–1.3) | 1.2 (1.1–1.4) | 1.2 (1.1–1.4) |