TABLE 1.
Smoker characteristics
| Inclusion criteria for smokers | Number of studies |
|---|---|
| Heavy smokers not further specified | 1 |
| Current smoker not further specified | 1 |
| ≥30 cig/days | 1 |
| ≥20 cig/day | 8 |
| 10–20/25 cig/day | 10 |
| ≥15 cig/day | 4 |
| ≥12 cig/day | 2 |
| ≥10 cig/day | 12 |
| ≥5 but ≤10 cig/day | 1 |
| ≥7 cig/day | 1 |
| ≥5 cig/day | 1 |
| ≤20 cig/day | 1 |
| ≤10 cig/day | 1 |
| 2 cig/week | 1 |
| Not reported | 4 |
Note: Smoker populations comprised a wide range of smoking requirements per protocol, and actual smoking; shown are details of smoking‐related inclusion criteria along with the number of studies that applied these criteria.