Table 1. Descriptive statistics by gender.

	Total	Male	Female	p value a
Background factors
Gender	807(100)	302(37.4)	505(62.6)
Age group (years)				0.002
< 20	42(5.2)	15(5.0)	27(5.3)
20–29	307(38)	137(45.4)	170(33.7)
30–39	325(40.3)	98(32.5)	227(45.0)
≥ 40	133(16.5)	52(17.1)	81(16.0)
Highest education level attained				<0.001
Primary	53(6.6)	9(3.0)	44(8.7)
Junior high school	499(61.8)	155(51.3)	344(68.1)
Senior high school	218(27.0)	119(39.4)	99(19.6)
Bachelor degree or higher	37(4.6)	19(6.3)	18(3.6)
Current marital status				0.001
Single	233(28.9)	110(36.5)	123(24.4)
Divorced/ widowed	16(2.0)	7(2.3)	9(1.8)
Married	558(69.1)	185(61.2)	373(73.8)
Type of worker				0.063
Production line	759(94.1)	277(91.7)	482(95.4)
Office	22(2.7)	13(4.3)	22(2.7)
Others	26(3.2)	12(4.0)	26(3.2)
Working hours (per week)				0.020
≤48	244(30.2)	75(24.8)	169(33.5)
49–60	302(37.4)	113(37.4)	189(37.4)
61–69	68(8.4)	35(11.6)	33(6.5)
70–75	106(13.1)	45(14.9)	61(12.1)
≥76	87(10.8)	34(11.3)	53(10.5)
Psychosocial factors
Perceived Social Support Scale (Mean, SD)	5.7(1.37)	5.55(1.43)	5.79(1.33)	0.015
Workload Subscale score (Job stress) (Mean, SD)	17.57(7.99)	19.15(8.20)	16.63(7.72)	<0.001
Physical activity level (moderate/vigorous)				0.060
None	289(35.8)	99(32.8)	190 (37.6)
≤0.5 hr/week	273(33.8)	91(30.1)	182(36.0)
0.5–1 hr/week	135(16.7)	59(19.5)	76(15.0)
1–1.5 hr/week	27(3.3)	13(4.3)	14(2.8)
1.5–2 hr/week	20(2.5)	11(3.6)	9(1.8)
2–2.5 hr/week	27(3.3)	14(4.6)	13(2.6)
>2.5 hr/week	36(4.5)	15(5.0)	21(4.2)

^a Statistical test: t test for continuous variable and χ2 test for categorical variables were used to analyze the gender differences.