Table 6.
Stratified meta-analysis of dose association of Environmental Tobacco Smoke (ETS) with female lung cancer in case-control studies.
| Exposures | Number | OR (95% CI) | I2 (95% UI) | p Value | Model |
|---|---|---|---|---|---|
| Pack-Year | |||||
| <20 | 4 | 0.93 (0.77–1.13) | 25 (0–71) | 0.26 | Fixed |
| ≥20 | 3 | 1.74 (1.04–2.90) | 74 (11–92) | 0.02 | Random |
| Years of Exposure | |||||
| <20 | 7 | 1.71 (1.01–2.90) | 79 (58–90) | <0.01 | Random |
| ≥20 | 6 | 1.57 (1.05–2.35) | 70 (31–87) | <0.01 | Random |
| Cigarettes/Day | |||||
| <10 | 4 | 1.23 (0.90–1.69) | 61 (0–87) | 0.05 | Random |
| ≥10 | 4 | 1.53 (0.69–3.40) | 88 (72–95) | <0.01 | Random |