Table 1.

Characteristics of lung cancer cases and controls, by sex

Men
Women
Cases n = 136Controls n = 272Cases n = 71Controls n = 142
General characteristics
Age at blood draw (y), mean (SD)*71.5 (6.5)71.1 (6.8)71.0 (7.1)70.4 (7.2)
Fasting hours before blood draw, mean (SD) *12.1 (4.5)12.1 (4.4)12.6 (3.9)12.3 (3.7)
Smoking status, n (%)*
    Never31 (23%)62 (23%)21 (30%)42 (30%)
    Former51 (38%)102 (38%)23 (32%)46 (32%)
    Current54 (40%)108 (40%)27 (38%)54 (38%)
Pack-years, mean (SD)37.7 (33.7)19.7 (21.3)26.9 (29.9)11.6 (17.4)
Ethnicity, n (%)*
    African-American45 (33%)90 (33%)20 (28%)40 (28%)
    Caucasian22 (16%)44 (16%)19 (27%)38 (27%)
    Japanese-American37 (27%)74 (27%)13 (18%)26 (18%)
    Latino18 (13%)36 (13%)10 (14%)20 (14%)
    Native Hawaiian14 (10%)28 (10%)9 (13%)18 (13%)
Body mass index (kg/m2), mean (SD)26.4 (4.6)25.8 (4.1)25.5 (5.4)26.8 (5.5)
High school education or less, n (%)64 (47%)100 (37%)28 (40%)67 (47%)
Physical activity (METS per day), mean (SD)1.7 (0.3)1.7 (0.3)1.6 (0.2)1.6 (0.2)
Family history of lung cancer, n (%)18 (13%)15 (6%)3 (4%)17 (12%)
Supplement use for > 1 year, n (%)59 (44%)131 (48%)32 (45%)73 (51%)
  • * Matching variable.