Relative risk estimates for smoking-related-lung cancer among relatives of 1747 smoking-related probands
| Relative | n | obs/exp | Relative risk (95% CI) | p Value |
|---|---|---|---|---|
| First | 5747 | 114/44.1 | 2.58 (2.13 to 3.10) | <0.001 |
| Second | 12 105 | 77/45.8 | 1.68 (1.33 to 2.10) | <0.001 |
| Third | 32 104 | 265/198.4 | 1.34 (1.18 to 1.51) | <0.001 |
| Fourth | 76 600 | 417/362.0 | 1.15 (1.04 to 1.27) | 0.0042 |
obs/exp, observed/expected.