Table 3

 Comparison of cases with controls by other smoking variables*

Odds ratios (95% confidence interval)
All cases (n = 431)v controls (n = 279)All cases with CNV (n = 326)v controls (n = 279)All cases with GA (n = 172) v controls (n = 279)
*The logistic regression model included age, sex, pack years of cigarette smoking, pack years of smoking other tobacco products, and inhalation status.
†Denotes reference category.
Pack years of cigarette smoking
    0†1.001.001.00
    0.1–200.84 (0.50 to 1.42)0.81 (0.47 to 1.40)0.79 (0.41 to 1.54)
    20.1–401.62 (0.86 to 3.05)1.51 (0.77 to 2.93)1.65 (0.74 to 3.67)
    >402.75 (1.22 to 6.20)2.49 (1.06 to 5.82)3.43 (1.28 to 9.20)
p Value (two tailed) for pack years0.0020.0070.003
Pack years of smoking other tobacco products
    0†1.001.001.00
    0.1–201.34 (0.83 to 2.16)(0.83 to 2.28)1.15 (0.62 to 2.10)
    20.1–400.82 (0.22 to 3.00)1.05 (0.28 to 3.96)1.21 (0.27 to 5.36)
    >400.28 (0.06 to 1.37)0.13 (0.01 to 1.26)0.67 (0.14 to 3.35)
p Value (two tailed) for pack years of other tobacco smoked0.210.180.91
Inhaled
    Not at all†1.001.001.00
    A little1.01 (0.59 to 1.71)0.96 (0.55 to 1.70)1.09 (0.55 to 2.13)
    Deeply1.00 (0.55 to 1.82)1.05 (0.56 to 1.98)0.86 (0.39 to 1.88)
p Value (two tailed) for inhaled1.000.950.76