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Table 3.

Number of first-degree relatives with cancer and risk of lung cancer among nonsmokers

CasesPerson-yearsRR* (95% CI)
Any cancer    
    1 31 105.88 0.86 (0.58-1.27) 
    2 12 29.14 1.95 (1.08-3.54) 
    3+ 12.48 3.17 (1.00-10.03) 
    Ptrend   0.0016 
Tobacco-related cancers    
    1 16 59.93 1.07 (0.64-1.79) 
    2 7.64 2.03 (0.50-8.19) 
    3+   
    Ptrend   0.4606 
CasesPerson-yearsRR* (95% CI)
Any cancer    
    1 31 105.88 0.86 (0.58-1.27) 
    2 12 29.14 1.95 (1.08-3.54) 
    3+ 12.48 3.17 (1.00-10.03) 
    Ptrend   0.0016 
Tobacco-related cancers    
    1 16 59.93 1.07 (0.64-1.79) 
    2 7.64 2.03 (0.50-8.19) 
    3+   
    Ptrend   0.4606 
*

Adjusted for age, passive smoking, number of siblings, and number of children.

Tobacco related cancers including cancer of the lung, oral cavity, pharynx, esophagus, pancreas, bladder, and kidney.

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