Table 1

Demographic information

Cases (n = 233)Controls (n = 209)OR (95% CI)aPb
n%Mean (SD)n%Mean (SD)
Sex0.24
 Female5322.83818.2NDc
 Male18077.217181.8
Ethnicity0.32
 White21491.819794.3ND
 Black198.2125.7
Age range (years)0.10
 ≤605925.36531.1
 60–709038.68842.1ND
 >708436.15626.8
Mean Age65.8 (10.8)63.4 (10.3)
Smoking History<0.001
 Never3816.47535.91.0ref
 Quit13658.610851.73.2 (1.9–5.3)
 Current5825.02612.46.1 (3.2–11.7)
Pack-years<0.001
 Nonsmoker4218.17837.51.0ref
 1–35 pack-years7532.37636.52.5 (1.4–4.3)
 >35 pack-years11549.65426.05.6 (3.2–9.9)
Mean pack-years39.9 (35.7)24.2 (32.3)
Years smoked<0.001
 Nonsmoker3816.47535.91.0ref
 1–34 years smoked9139.49244.02.6 (1.5–4.5)
 >34 years smoked10244.24220.15.9 (3.3–10.5)
Mean years smoked29.3 (19.8)16.8 (16.8)
  • a Adjusted for age, sex, and ethnicity.

  • b χ2 test for homogeneity of proportions in contingency table.

  • c ND, not determined: cases and controls were frequency-matched on these variables.