Table 1. Distributions of baseline characteristics according to educational levels.

	Educational levels
	Junior high school	High school	Junior or career college	University or higher education	P for trend
Men
Number of subjects	10 350	8437	1074	1968
Age, years	50.5	48.1	47.5	46.7	<0.001
Previous history of stroke, ischemic heart disease, or cancer, %	3.6	3.0	2.8	2.3	<0.001
Current drinker, %	64.3	69.3	65.1	65.9	0.006
Current smoker, %	54.9	53.1	51.0	47.0	<0.001
High perceived mental stress, %	20.0	29.3	33.9	43.8	<0.001
Living with spouse, %	76.0	86.4	87.9	90.6	<0.001
Full-time worker, %	96.0	97.4	97.8	97.8	<0.001
Women
Number of subjects	12 624	8894	2305	504
Age, years	50.7	48.0	46.3	45.7	<0.001
Previous history of stroke, ischemic heart disease, or cancer, %	4.1	3.3	3.9	3.1	0.08
Current drinker, %	9.0	11.0	11.0	10.2	<0.001
Current smoker, %	7.6	6.8	6.5	6.5	0.02
High perceived mental stress, %	18.5	22.8	29.3	40.9	<0.001
Living with spouse, %	69.6	81.6	81.6	83.2	<0.001
Full-time worker, %	74.0	76.7	76.5	85.9	<0.001