Table 1 Characteristics of the 101,823 subjects in the Guangzhou Occupational Cohorts, at baseline (1992)
From: Smoking and nasopharyngeal carcinoma mortality: a cohort study of 101,823 adults in Guangzhou, China
Men | Women | Total | |
|---|---|---|---|
N = 86,269 (%) | N = 15,554 (%) | N = 101,823 (%) | |
Age, years | |||
30–34 | 4568 (5.5) | 993 (6.4) | 5561 (5.5) |
35–39 | 41,645 (48.3) | 8452 (54.3) | 50,097 (49.2) |
40–44 | 21,769 (25.2) | 4107 (26.4) | 25,876 (25.4) |
45–49 | 9663 (25.2) | 1488 (9.6) | 11,151 (11.0) |
50–54 | 5033 (5.8) | 392 (2.5) | 5425 (5.3) |
55–59 | 3077 (3.6) | 80 (0.5) | 3157 (3.1) |
60+ | 514 (0.6) | 42 (0.3) | 556 (0.6) |
Marital status | |||
Married | 85,247 (98.8) | 15,143 (97.4) | 100,390 (98.6) |
Not married | 510 (0.6) | 345 (2.2) | 855 (0.8) |
Missing | 512 (0.6) | 66 (0.4) | 578 (0.6) |
Education level | |||
Primary or below | 7440 (8.6) | 3152 (20.3) | 10,592 (10.4) |
Secondary | 67,405 (78.1) | 11,073 (71.2) | 78,478 (77.1) |
Tertiary | 10,894 (12.6) | 1222 (7.9) | 12,116 (11.9) |
Missing | 530 (0.6) | 107 (0.7) | 637 (0.6) |
Rank | |||
Cadre | 19,535 (22.6) | 3326 (21.4) | 22,861 (22.5) |
Worker | 65,458 (75.9) | 12,090 (77.7) | 77,548 (76.2) |
Missing | 1276 (1.5) | 138 (0.9) | 1402 (1.4) |
Health status | |||
Healthy | 71,337 (82.7) | 11,666 (75.0) | 83,003 (81.5) |
Fairly Healthy | 9018 (10.5) | 2642 (17.0) | 11,660 (11.5) |
Abnormal | 1332 (1.5) | 74 (0.5) | 1406 (1.4) |
Unknown | 4346 (5.0) | 1061 (6.8) | 5407 (5.3) |
Missing | 236 (0.3) | 111 (0.7) | 347 (0.3) |
Smoking status | |||
Never smokers | 40,119 (46.5) | 15,464 (99.4) | 55,583 (54.6) |
Occasional smokers | 114 (0.1) | 1 (0.01) | 115 (0.1) |
Daily smokers | 45,988 (53.3) | 89 (0.6) | 46,077 (45.3) |
Ex-smokers | 13 (0.02) | 0 | 13 (0.01) |
Missing | 35 (0.04) | 0 | 35 (0.03) |
Drinking status | |||
Never drinkers | 71,340 (82.7) | 15,164 (97.5) | 86,504 (85.0) |
Occasional smokers | 6273 (7.3) | 341 (2.2) | 6614 (6.5) |
Daily drinkers | 8432 (9.8) | 43 (0.3) | 8475 (8.3) |
Ex-drinkers | 27 (0.03) | 0 | 27 (0.03) |
Missing | 197 (0.2) | 6 (0.04) | 203 (0.2) |