Table 1.

Comparing the age, sex, race/ethnicity, education, marital status, occupational status, family history of lung cancer, and cigarettes per day of cases and controls

VariablesControls, n = 100Cases, n = 100POR (95% CI)
Age at randomization0.0039
    ≤59 y51 (51%)28 (28%)reference
    60-64 y26 (26%)27 (27%)1.891 (0.931-3.843)
    65-69 y18 (18%)36 (36%)3.642 (1.756-7.557)
    ≥70 y5 (5%)9 (9%)3.278 (1.001-10.738)
Sex0.2913
    Women36 (36%)29 (29%)reference
    Men64 (64%)71 (71%)1.377 (0.760-2.495)
Race/Ethnicity0.0958
    White, non-Hispanic93 (93%)84 (84%)reference
    Black, non-Hispanic4 (4%)13 (13%)3.598 (1.129-11.465)
    Other3 (3%)3 (3%)1.107 (0.218-5.635)
Education0.5518
    <12 y10 (10%)15 (15%)1.345 (0.515-3.510)
    12 y or completed high school26 (26%)29 (29%)reference
    Post-high-school training other than college16 (16%)10 (10%)0.560 (0.216-1.450)
    Some college20 (20%)24 (24%)1.076 (0.486-2.383)
    College graduate19 (19%)13 (13%)0.613 (0.254-1.482)
    Postgraduate training9 (9%)9 (9%)0.897 (0.309-2.600)
Marital status0.8507
    Married or living as married75 (75%)69 (69%)reference
    Widowed10 (10%)10 (10%)1.087 (0.427-2.770)
    Divorced11 (11%)16 (16%)1.581 (0.686-3.642)
    Separated2 (2%)2 (2%)1.087 (0.149-7.928)
    Never married2 (2%)3 (3%)1.630 (0.264-10.051)
Occupation0.7811
    Homemaker6 (6%)5 (5%)reference
    Working44 (44%)36 (36%)0.982 (0.277-3.482)
    Unemployed3 (3%)2 (2%)0.800 (0.093-6.848)
    Retired39 (39%)49 (49%)1.508 (0.428-5.311)
    Disabled4 (4%)5 (5%)1.500 (0.255-8.817)
    Other/not answered4 (4%)3 (3%)0.900 (0.133-6.080)
Family history of lung cancer0.1456
    No94 (94%)88 (88%)reference
    Yes6 (6%)12 (12%)2.136 (0.769-5.937)
Cigarettes per day0.0576
    11-2048 (48%)49 (49%)reference
    21-3037 (37%)23 (23%)0.609 (0.316-1.173)
    31-4013 (13%)21 (21%)1.582 (0.712-3.515)
    41 +2 (2%)7 (7%)3.429 (0.678-17.344)