Table 1.
Characteristics of non-Hispanic white participants in Los Angeles and Chinese participants in Shanghai
| Los Angeles County
|
Shanghai
|
|||
|---|---|---|---|---|
| Cases, n (%) | Controls, n (%) | Cases, n (%) | Controls, n (%) | |
| Number of participants | 509 (100) | 602 (100) | 541 (100) | 535 (100) |
| Reference age, y | ||||
| Mean ± SD | 54.4 ± 7.1 | 54.4 ± 8.0 | 60.7 ± 9.8 | 61.8 ± 10.0 |
| Median | 56 | 56 | 63 | 64 |
| ≤45 | 53 (10.4) | 74 (12.3) | 51 (9.4) | 44 (8.2) |
| 45—49 | 58 (11.4) | 70 (11.6) | 31 (5.7) | 17 (3.2) |
| 50—54 | 94 (18.5) | 112 (18.6) | 38 (7.0) | 27 (5.0) |
| 55—59 | 155 (30.5) | 170 (28.2) | 44 (8.1) | 64 (12.0) |
| 60+ | 149 (29.3) | 176 (29.2) | ||
| 60—64 | 141 (26.1) | 120 (22.4) | ||
| 65+ | 236 (43.6) | 263 (49.2) | ||
| Sex | ||||
| Male | 401 (78.8) | 485 (80.6) | 429 (79.3) | 412 (77.0) |
| Female | 108 (21.2) | 117 (19.4) | 112 (20.7) | 123 (23.0) |
| Education | ||||
| Elementary or below | / | / | 181 (33.5) | 176 (32.9) |
| Middle school | / | / | 158 (29.2) | 154 (28.8) |
| High school | / | / | 93 (17.2) | 90 (16.8) |
| High school or below | 169 (33.2) | 140 (23.3) | ||
| 1–3 years of college | 167 (32.8) | 188 (31.2) | 70 (12.9) | 76 (14.2) |
| College graduate | 173 (34.0) | 274 (45.5) | 39 (7.2) | 39 (7.3) |
| Pχ2(2df) < 0.0001 | Pχ2(4df) = 0.98 | |||
| Cigarette smoking | ||||
| Never | 95 (18.7) | 237 (39.4) | 182 (33.6) | 238 (44.5) |
| Former | 193 (37.9) | 259 (43.0) | 76 (14.0) | 86 (16.1) |
| Current | 221 (43.4) | 106 (17.6) | 283 (52.3) | 211 (39.4) |
| Pχ2(2df) < 0.0001 | Pχ2(2df) < 0.0001 | |||
| NSAID use | ||||
| Nonusers | 313 (61.5) | 355 (59.0) | / | / |
| 1-<1,441 pills over lifetime | 87 (17.1) | 116 (19.3) | / | / |
| ≥1,441 pills over lifetime | 103 (20.2) | 129 (21.4) | / | / |
| Unknown | 6 (1.2) | 2 (0.3) | / | / |
| Pχ2(3df) = 0.27 | ||||
| Stage/grade | ||||
| Tis | 30 (5.9) | / | / | / |
| Ta/G1 | 112 (22.0) | / | / | / |
| Ta/G2 | 172 (33.8) | / | / | / |
| Ta/G3—4 | 28 (5.5) | / | / | / |
| Ta/unknown | 2 (0.4) | / | / | / |
| T1/G1 | 8 (1.6) | / | / | / |
| T1/G2 | 41 (8.1) | / | / | / |
| T1/G3—4 | 53 (10.4) | / | / | / |
| T2–4/G1 | 2 (0.4) | |||
| T2–4/G2 | 8 (1.6) | / | / | / |
| T2–4/G3—4 | 48 (9.4) | / | / | / |
| Unknown | 5 (1.0) | / | / | / |
| Ta | 314 (61.7) | |||
| Other | 190 (37.3) | |||
| Unknown | 5 (1.0) | |||
| Stage/grade | ||||
| Ta/G1–2a | 284 (55.8) | / | / | / |
| All other stage/gradeb | 218 (42.8) | / | / | / |
| Unknown | 7 (1.4) | / | / | / |