borderline significantP =0.07
Borderline significant differences were observed for exposure to ETS at work ( P =0.07).
Borderline significant differences were observed for exposure to ETS at work ( P =0.07).
Although there was a significant trend of increasing risk with numbers of affected relatives ( Table 1 ), there was no significant effect of family history (any vs none) of lung cancer in the study population overall or in late-onset cases, regardless of the age of affected relatives.