Estimates of relative risk (RR) of lung cancer in the last spouse of cases with lung cancer
| Probands | n (cases) | n (spouses) | obs/exp | Relative risk (95% CI) | p Value |
|---|---|---|---|---|---|
| All lung cancer | 5554 | 2651 | 60/25.2 | 2.38 (1.81 to 3.06) | <0.001 |
| Smoking cases | 1741 | 683 | 19/6.9 | 2.75 (1.66 to 4.30) | <0.001 |
| Non-smoking cases | 784 | 476 | 7/5.7 | 1.24 (0.50 to 2.55) | 0.34 |
obs/exp, observed/expected.