Duration of exposure to study treatment and duration of follow-up in the core study
| Duration | Exposure to study treatment | Follow-up | ||||||
|---|---|---|---|---|---|---|---|---|
| Letrozole, n = 2,563 | Placebo, n = 2,573 | Letrozole, n = 2,582 | Placebo, n = 2,586 | |||||
| Median | 24 | 24 | 28 | 27 | ||||
| Estimated percentage of patients at | On the study treatment (%) | Followed up (%) | ||||||
| 1 y | 82 | 82 | 95 | 95 | ||||
| 2 y | 50 | 50 | 62 | 61 | ||||
| 3 y | 24 | 23 | 31 | 30 | ||||
| 4 y | 8 | 8 | 10 | 10 | ||||
| 5 y | 0.2 | 0.2 | 0.2 | 0.3 | ||||