Table 1.

Characteristics of the 101,823 subjects in the Guangzhou Occupational Cohorts, at baseline (1992)

	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)