Table 1.
Distribution of selected characteristics by lung cancer status
| Discovery phase | Replication phase | Pooled sample | ||||
|---|---|---|---|---|---|---|
| Characteristics | Controls (n = 44) | Cases (n = 57) | Controls (n = 39) | Cases (n = 23) | Controls (n = 83) | Cases (n = 80) |
| Age, mean (SD) | 57.70 (8.49) | 59.02 (9.11) | 58.54 (9.59) | 62.09 (7.48) | 58.10 (8.97) | 59.90 (8.74) |
| BMI, mean (SD) | 24.57 (3.39) | 24.89 (3.84) | 25.47 (5.10) | 23.78 (2.14) | 24.99 (4.27) | 24.57 (3.46) |
| Sex, n(%) | ||||||
| Male (SMHS) | 5 (11.4) | 6 (10.5) | 14 (35.9) | 13 (56.5) | 19 (22.9) | 19 (23.8) |
| Female (SWHS) | 39 (88.6) | 51 (89.5) | 25 (64.1) | 10 (43.5) | 64 (77.1) | 61 (76.2) |
| Secondhand Smoking, n(%) | ||||||
| Never | 12 ( 30.8) | 15 ( 29.4) | 4 ( 10.3) | 2 ( 8.7) | 16 ( 19.3) | 17 (21.2) |
| Ever | 27 ( 69.2) | 36 ( 70.6) | 21 ( 53.8) | 8 (34.8) | 48 ( 57.8) | 44 (55.0) |
| missing | 5 (11.4) | 6 (10.5) | 14 ( 35.9) | 13 (56.5) | 19 ( 22.9) | 19 (23.8) |
| Histological Subtypes, n(%) | ||||||
| Adenocarcinoma | 21 (36.8) | 10 (43.5) | 31 (38.8) | |||
| Non-adenocarcinoma | 7 (12.3) | 0 (0) | 7 (8.8) | |||
| Unclassified | 29 (50.9) | 12 (52.2) | 41 (51.2) | |||
| Unknown | 0 (0.0) | 1 (4.3) | 1 (1.2) | |||
Abbreviations: SMHS= Shanghai Men’s Health Study; SWHS= Shanghai Women’s Health Study; SD= standard deviation