Table 1.

Characteristics of the study population (N = 68,416).

Characteristics	Categories	n	Rate (%)
Cause of hospitalization	All cause	5,278	7.72
	Circulatory system disease	1,371	2.00
	Respiratory system diseases	384	0.56
	Digestive system disease	485	0.71
	Endocrine, nutritional and metabolic diseases	280	0.41
Basic demographics
Age	≤65	28,204	41.20
	>65	40,212	58.80
Gender	Male	27,734	40.50
	Female	40,682	59.50
Ethnicity	Han	67,563	98.80
	Others	853	1.20
Education	Illiterate or primary	37,366	54.60
	Secondary	23,180	33.90
	College or higher	7,870	11.50
Retired	Yes	3,255	4.80
	No	65,161	95.20
Marital status	Single	14,377	21.00
	Married	48,998	71.60
	Widowed	3,854	5.60
	Divorced or separated	1,187	1.70
Lifestyle information
Smoking status	Never	59,259	86.60
	Light	2,050	3.00
	Heavy	7,107	10.40
Alcohol intake	Never	61,580	90.00
	Under limit	5,799	8.50
	Over limit	1,037	1.50
Activity level	Light	23,663	34.60
	Moderate	28,636	41.80
	Heavy	16,117	23.60
Preexisting health condition
BMI	Underweight	6,781	9.90
	Normal	38,427	56.20
	Overweight	17,985	26.30
	Obese	5,223	7.60
Hypertension	No	46,339	67.70
	Yes	22,077	32.30
Diabetes	No	60,271	88.10
	Yes	8,145	11.90
Hyperlipidemia	No	54,756	80.00
	Yes	13,660	20.00