Table 1. Selected demographic characteristics of cases and controls.

	Total		Men		Women
	Cases (2909)	Controls (2947)	Cases (2027)	Controls (2048)	Cases (882)	Controls (899)
	Age (years)	62.11 ± 11.72	60.35 ± 11.42***	59.92 ± 12.05	58.37 ± 11.72***	67.06 ± 9.05	64.60 ± 9.07***
	BMI	24.68 ± 3.10	24.40 ± 2.91***	24.68 ± 2.93	24.32 ± 2.86***	24.70 ± 3.46	24.58 ± 3.02
Annual income
<10 000 yuan	1869 (64.7%)	1782 (60.6%)**	1185 (58.7%)	1161 (56.8%)	684 (78.4%)	621 (69.4%)***
≥10 000 yuan	1021 (35.3%)	1157 (39.4%)**	833 (41.3%)	883 (43.2%)	188 (21.6%)	274 (30.6%)***
Tobacco
Smokers	1694 (58.2%)	1186 (40.2%)***	1506 (74.6%)	1112 (54.3%)***	175 (20.0%)	73 (8.1%)***
Nonsmokers	1215 (41.8%)	1761 (59.8%)***	513 (25.4%)	935 (45.7%)***	702 (80.0%)	826 (91.9%)***
Alcohol
Regular drinkers	1068 (37.0%)	1198 (40.8%)	988 (49.0%)	1078 (52.7%)*	80 (9.1%)	120 (13.4%)**
Nondrinkers	1824 (62.7%)	1746 (59.2%)	1028 (51.0%)	967 (47.3%)*	796 (90.9%)	779 (86.6%)**
History of hypertension
Yes	1145 (39.4%)	656 (22.3%)***	736 (36.3%)	416 (20.3%)***	409 (46.4%)	240 (26.7%)***
No	1764 (60.6%)	2291 (77.7%)***	1291 (63.7%)	1632 (79.7%)***	473 (53.6%)	659 (73.3%)***
History of diabetes
Yes	360 (12.4%)	87 (3.0%)***	204 (10.1%)	56 (2.7%)***	156 (17.7%)	31 (3.5%)***
No	2549 (87.6%)	2860 (97.0%)***	1832 (89.9%)	1992 (97.3%)***	726 (82.3%)	868 (96.5%)***
Psychosocial index	0.18 (0.00, 0.72)	0.18 (0.00, 0.18)***	0.18 (0.00, 0.72)	0.18 (0.00, 0.18)***	0.18 (0.00, 0.72)	0.18 (0.00, 0.18)***
Physical activity
Moderate/strenuous	110 (3.8%)	121 (4.1%)	92 (4.5%)	98 (4.8%)	18 (2.0%)	22 (2.4%)
None/light	2799 (96.2%)	2826 (95.9%)	1935 (95.5%)	1950 (95.2%)	864 (98.0%)	877 (97.6%)
ApoB/ApoA1 ratio	0.70 ± 0.22	0.61 ± 0.20***	0.71 ± 0.21	0.62 ± 0.21***	0.71 ± 0.24	0.59 ± 0.18**
Weekly servings of ​ vegetables and fruit	19.34 ± 11.63	20.54 ± 11.32***	19.31 ± 11.69	20.41 ± 11.55**	19.42 ± 11.49	20.86 ± 10.77**

Comparison of cases and controls: *P < 0.05, **P < 0.01, ***P < 0.001. Psychosocial index is shown as median (Q1, Q3).