Comparing the age, sex, race/ethnicity, education, marital status, occupational status, family history of lung cancer, and cigarettes per day of cases and controls
| Variables | Controls, n = 100 | Cases, n = 100 | P | OR (95% CI) |
|---|---|---|---|---|
| Age at randomization | 0.0039 | |||
| ≤59 y | 51 (51%) | 28 (28%) | reference | |
| 60-64 y | 26 (26%) | 27 (27%) | 1.891 (0.931-3.843) | |
| 65-69 y | 18 (18%) | 36 (36%) | 3.642 (1.756-7.557) | |
| ≥70 y | 5 (5%) | 9 (9%) | 3.278 (1.001-10.738) | |
| Sex | 0.2913 | |||
| Women | 36 (36%) | 29 (29%) | reference | |
| Men | 64 (64%) | 71 (71%) | 1.377 (0.760-2.495) | |
| Race/Ethnicity | 0.0958 | |||
| White, non-Hispanic | 93 (93%) | 84 (84%) | reference | |
| Black, non-Hispanic | 4 (4%) | 13 (13%) | 3.598 (1.129-11.465) | |
| Other | 3 (3%) | 3 (3%) | 1.107 (0.218-5.635) | |
| Education | 0.5518 | |||
| <12 y | 10 (10%) | 15 (15%) | 1.345 (0.515-3.510) | |
| 12 y or completed high school | 26 (26%) | 29 (29%) | reference | |
| Post-high-school training other than college | 16 (16%) | 10 (10%) | 0.560 (0.216-1.450) | |
| Some college | 20 (20%) | 24 (24%) | 1.076 (0.486-2.383) | |
| College graduate | 19 (19%) | 13 (13%) | 0.613 (0.254-1.482) | |
| Postgraduate training | 9 (9%) | 9 (9%) | 0.897 (0.309-2.600) | |
| Marital status | 0.8507 | |||
| Married or living as married | 75 (75%) | 69 (69%) | reference | |
| Widowed | 10 (10%) | 10 (10%) | 1.087 (0.427-2.770) | |
| Divorced | 11 (11%) | 16 (16%) | 1.581 (0.686-3.642) | |
| Separated | 2 (2%) | 2 (2%) | 1.087 (0.149-7.928) | |
| Never married | 2 (2%) | 3 (3%) | 1.630 (0.264-10.051) | |
| Occupation | 0.7811 | |||
| Homemaker | 6 (6%) | 5 (5%) | reference | |
| Working | 44 (44%) | 36 (36%) | 0.982 (0.277-3.482) | |
| Unemployed | 3 (3%) | 2 (2%) | 0.800 (0.093-6.848) | |
| Retired | 39 (39%) | 49 (49%) | 1.508 (0.428-5.311) | |
| Disabled | 4 (4%) | 5 (5%) | 1.500 (0.255-8.817) | |
| Other/not answered | 4 (4%) | 3 (3%) | 0.900 (0.133-6.080) | |
| Family history of lung cancer | 0.1456 | |||
| No | 94 (94%) | 88 (88%) | reference | |
| Yes | 6 (6%) | 12 (12%) | 2.136 (0.769-5.937) | |
| Cigarettes per day | 0.0576 | |||
| 11-20 | 48 (48%) | 49 (49%) | reference | |
| 21-30 | 37 (37%) | 23 (23%) | 0.609 (0.316-1.173) | |
| 31-40 | 13 (13%) | 21 (21%) | 1.582 (0.712-3.515) | |
| 41 + | 2 (2%) | 7 (7%) | 3.429 (0.678-17.344) |