Table 1.
Characteristics of Study Population
| Cases (N=299) | Hospital Controls (N=228) | Pa | Population Controls (N=322) | Pb | |
|---|---|---|---|---|---|
| Age (y), mean (SD) | 66.7 (10.6) | 65.74(10.7) | 0.26 | 66.9 (8.8) | 0.79 |
| Male | 67.0 (10.1) | 69.0 (9.6) | 0.08 | 68.0 (7.9) | 0.34 |
| Female | 66.5 (11.1) | 62.78 (10.8) | <0.01 | 65.9 (9.6) | 0.59 |
| Gender, N (%) | |||||
| Male | 144 (48) | 108 (47) | 165 (51) | ||
| Female | 155 (52) | 120 (53) | 0.86 | 157 (49) | 0.44 |
| Race, N (%) | |||||
| African American | 81 (27) | 64 (28) | 157 (49) | ||
| Caucasian | 218 (73) | 164 (72) | 0.80 | 165 (51) | <0.01 |
| Smoking status, N (%) | |||||
| Never | 14 (5) | 29 (13) | 128 (40) | ||
| Former | 127 (42) | 124 (54) | 154 (48) | ||
| Current | 158 (53) | 75 (33) | <0.01 | 40 (12) | <0.01 |
| Pack-years, N (%) | |||||
| ≤20 | 50 (18) | 36 (18) | 98 (52) | ||
| 21–40 | 92 (32) | 57 (29) | 53 (28) | ||
| 41–60 | 83 (29) | 51 (25) | 31 (16) | ||
| >60 | 59 (21) | 55 (28) | 0.33 | 8 (4) | <0.01 |
Pa: comparison between cases and hospital controls
Pb: comparison between cases and population controls