Table 3.
The baseline characteristics of participants in the Jinchang Cohort Study
| Variables | Male, n (%) | Female, n (%) | Total, n (%) |
|---|---|---|---|
| Sex | 26008 (61.7) | 16114 (38.3) | 42122 (100) |
| Age, mean ± SD, (years) | 46.8±14.1 | 45.8±11.8 | 46.4±13.3 |
| Behavioural risk factors | |||
| Current smokersa | 15323 (58.9) | 218 (1.4) | 15541 (36.9) |
| Former smokers | 3556 (13.7) | 48 (0.3) | 3604 (8.6) |
| Current drinkersb | 7841 (30.2) | 342 (2.1) | 8183 (19.4) |
| Former drinkers | 1670 (6.4) | 38 (0.2) | 1708 (4.1) |
| Height (cm) | 171.7 (6.2) | 161.9 (5.9) | 167.9 (7.7) |
| Weight (kg) | 71.1 (10.4) | 59.4 (8.9) | 66.6 (11.3) |
| Systolic blood pressure (SBP), (mmHg) | 126.3 ± 19.1 | 118.7 ± 20.0 | 123.4 ± 19.8 |
| Diastolic blood pressure (DBP), (mmHg) | 80.0 ± 12.6 | 76.5 ± 12.0 | 78.7 ± 12.5 |
| BMI | |||
| Normal (< 25) | 16411 (63.1) | 12646 (78.5) | 29057 (69.0) |
| Overweight (25-29.9) | 8709 (33.5) | 3024 (18.8) | 11733 (27.9) |
| Obesity (≥ 30) | 888 (3.4) | 444 (2.8) | 1332 (3.2) |
| Occupation | |||
| Management and services | 6099 (23.5) | 3915 (24.3) | 10014 (23.8) |
| Chemical/metal production | 6614 (25.5) | 8000 (49.6) | 14614 (34.7) |
| Mining/smelting | 13295 (51.1) | 4199 (26.1) | 17494 (41.5) |
| Hypertensionc | 8504 (32.7) | 3658 (22.7) | 12162 (28.9) |
| Type 2 diabetesd | 2329 (9.0) | 832 (5.2) | 3161 (7.5) |
| Hyperlipidaemiae | 14112 (54.3) | 5448 (33.8) | 19560 (46.4) |
| Self-reported diseases | |||
| Chronic rhinitis | 2698 (10.4) | 2019 (12.5) | 4717 (11.2) |
| Gall stones | 2082 (8.0) | 2155 (13.4) | 4237 (10.1) |
| Fatty liver | 3203 (12.3) | 1060 (6.6) | 4263 (10.1) |
| Cholecystitis | 1981 (7.6) | 2080 (12.9) | 4061 (9.6) |
| Protrusion of intervertebral disc | 1986 (7.6) | 1830 (11.4) | 3816 (9.1) |
| Chronic sore throat | 1757 (6.8) | 1480 (9.2) | 3237 (7.7) |
| Uterine fibroids | — | 1498 (11.1) | — |
| Chronic gastritis | 1628 (6.3) | 1090 (6.8) | 2718 (6.5) |
SD, standard deviation.
Current smokers were defined as those who smoked at least one cigarette per day in the past 6 months.
Current drinkers were those who drank hard liquor, beer or wine at least once per week during the past 6 months.
Hypertension was defined as systolic blood pressure ≥ 140 mmHg or diastolic ≥ 90 mmHg, or self-reported treatment for hypertension.
Type 2 diabetes was recorded if participants were on anti-diabetic medications or if their baseline fasting plasma glucose(FPG) was high (≥ 7.0 mmol/l) at the time of cohort entry.
Hyperlipidaemia were defined as: TG ≥ 1.70 mmol/l (150 mg/dl), or HDL-C < 0.9 mmol/l (35 mg/dl) in men and < 1.0 mmol/l (39 mg/dl) in women.