Table 5.
Overview of the association of ETS dose with female lung cancer in cohort studies.
| Exposure | Study | Exposure Categories | RR (95% CI) | p Trend |
|---|---|---|---|---|
| Pack-year 1 | Kurahashi | <30 | 1.05 (0.55–2.02) | 0.03 |
| ≥30 | 1.46 (0.85–2.50) | |||
| Duration(year) | Wang | <20 | 1.11 (0.74–1.65) | 0.24 |
| 20–30 | 1.11 (0.63–1.96) | |||
| ≥30 | 1.61 (1.00–2.58) | |||
| Jee | 1–29 | 1.60 (0.80–3.00) | <0.01 | |
| ≥30 | 3.10 (1.40–6.60) | |||
| Cigarettes/day | Kurahashi | <20 | 1.02 (0.51–2.04) | 0.02 |
| ≥20 | 1.47 (0.87–2.49) | |||
| Jee | 1–19 | 2.00 (1.10–3.90) | <0.10 | |
| ≥20 | 1.50 (0.70–3.30) |
Pack-year 1 = cigarettes smoked every day/20 × smoking year.