Table 1 Intervals 1, 2 and 3 by launch period
From: Drug safety: withdrawn medications are only part of the picture
Launch period | Interval | Number of medications | Median (years) | Interquartile range (years) |
|---|---|---|---|---|
Pre-1961 | 1 | 187 | 20 | 9–32 |
2 | 187 | 37 | 27–57 | |
3 | 187 | 16 | 6–28 | |
1961–1975 | 1 | 128a | 8 | 3–15 |
2 | 131 | 17 | 10–22 | |
3 | 128a | 5 | 1–11 | |
1976–1990 | 1 | 75 | 3 | 2–5 |
2 | 75 | 6 | 4–12 | |
3 | 75 | 2 | 0–6 | |
1991–2013 | 1 | 69 | 1 | 0–4 |
2 | 69 | 3 | 1–6 | |
3 | 69 | 1 | 0–2 |