Table 1.
Characteristics of non-Hispanic whites in Los Angeles County and Shanghai Chinese
| Los Angeles County |
Shanghai |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cases n=456 | Controls n=480 | Cases n=532 | Controls n=524 | |||||||
| Mean age at enrollment (SD) | 56 | (±7) | 56 | (±8) | 63 | (±10) | 64 | (±10) | ||
| Age at enrollment (y) | ||||||||||
| ≤45 | 51 | (11%) | 62 | (13%) | 51 | (10%) | 43 | (8%) | ||
| 45–49 | 54 | (12%) | 57 | (12%) | 30 | (6%) | 17 | (3%) | ||
| 50–54 | 83 | (18%) | 93 | (19%) | 38 | (7%) | 25 | (5%) | ||
| 55–59 | 138 | (30%) | 128 | (27%) | 43 | (8%) | 63 | (12%) | ||
| 60–64 | 129 | (28%) | 104 | (22%) | 137 | (26%) | 116 | (22%) | ||
| >65 | 1 | (0%) | 35 | (7%) | <0.001 | 233 | (44%) | 260 | (50%) | 0.016 |
| Gender | ||||||||||
| Male | 357 | (78%) | 374 | (78%) | 421 | (79%) | 404 | (77%) | ||
| Female | 99 | (22%) | 106 | (22%) | 0.890 | 111 | (21%) | 120 | (23%) | 0.424 |
| Smoking status | ||||||||||
| Never | 83 | (18%) | 183 | (38%) | 178 | (33%) | 233 | (44%) | ||
| Former | 173 | (38%) | 212 | (44%) | 75 | (14%) | 84 | (16%) | ||
| Current | 200 | (44%) | 85 | (18%) | <0.001 | 279 | (52%) | 207 | (40%) | <0.001 |
| Smoking intensity (cigarettes/day) | ||||||||||
| Never | 83 | (18%) | 183 | (38%) | 178 | (33%) | 233 | (44%) | ||
| <20 | 75 | (16%) | 88 | (18%) | 164 | (31%) | 155 | (30%) | ||
| ≥20 | 298 | (65%) | 209 | (44%) | <0.001 | 190 | (36%) | 136 | (26%) | <0.001 |
| Smoking duration (years) | ||||||||||
| Never | 83 | (18%) | 183 | (38%) | 178 | (33%) | 233 | (45%) | ||
| <29 | 162 | (36%) | 190 | (40%) | 106 | (20%) | 101 | (19%) | ||
| >29 | 211 | (46%) | 107 | (22%) | <0.001 | 248 | (47%) | 190 | (36%) | 0.001 |
| Pack-years of smoking | ||||||||||
| Never | 83 | (18%) | 183 | (38%) | 178 | (33%) | 233 | (44%) | ||
| > 24 pack-years | 116 | (25%) | 151 | (31%) | 155 | (29%) | 142 | (27%) | ||
| ≥ 24 pack-years | 257 | (56%) | 146 | (30%) | <0.001 | 199 | (37%) | 149 | (28%) | 0.001 |