Table 4.

Number of working hours per week and the risk of self-reported hypertension stratified by gender

Sex	Models	Number of working hours per week				p for trend
		≤40	41–50	51–60	≥61
		(n = 421)	(n = 337)	(n = 178)	(n = 143)
Males	Number of workers	286	223	117	77
	Model 1s (95% CI)	1.00 (reference)	1.61 (0.85-3.03)	1.49 (0.68-3.26)	1.79 (0.77-4.15)	0.151
	Model 2s (95% CI)	1.00 (reference)	1.61 (0.85-3.03)	1.50 (0.69-3.29)	1.61 (0.68-3.83)	0.217
	Model 3s (95% CI)	1.00 (reference)	1.73 (0.91-3.28)	1.72 (0.78-3.79)	1.63 (0.68-3.93)	0.163
	Model 4s (95% CI)	1.00 (reference)	2.19 (1.03-4.63)	2.56 (0.91-7.15)	2.54 (0.90-7.15)	0.093
Females	Number of workers	135	114	61	66
	Model 1s (95% CI)	1.00 (reference)	2.23 (0.83-6.03)	2.27 (0.73-7.05)	2.35 (0.79-6.99)	0.128
	Model 2s (95% CI)	1.00 (reference)	2.01 (0.74-5.47)	2.21 (0.71-6.90)	2.15 (0.72-6.42)	0.166
	Model 3s (95% CI)	1.00 (reference)	2.29 (0.83-6.29)	2.76 (0.86-8.85)	2.76 (0.90-8.43)	0.112
	Model 4s (95% CI)	1.00 (reference)	2.86 (0.79-10.34)	3.13 (0.74-13.17)	2.19 (0.49-9.84)	0.066

Model 1_s was not adjusted.

Model 2_s was adjusted for age.

Model 3_s was adjusted for age, and health-related factors including smoking habit, alcohol habit, regular exercise, and body mass index(BMI).

Model 4_s was adjusted for age, health-related factors, education and occupational factors including income, occupation, form of employment, and working days per week.

All hazard ratios were calculated using a Cox proportional hazards model with weight cases.

CI = Confidence interval.