Table 3

Association between average working hours for the past 6 months and stress response scores (model 2)*†

Stress responses	AWH	Model 2*† (final model)
Stress responses	AWH	Mean (SE)	P value	ηp²‡	Multiple comparison p value§
Vigour	I. <140 hour/month¶ (<35 hour/week)	2.30 (0.02)	0.000	0.003	0.560
	II. 140–180 hour/month (35–45 hour/week)	2.26 (0.01)			ref
	III. 180–205 hour/month (45–51.25 hour/week)	2.20 (0.02)			0.067
	IV. 205–220 hour/month (51.25–55 hour/week)	2.08 (0.04)			0.000
	V. ≥220 hour/month (≥55 hour/week)	1.97 (0.06)			0.000
Irritability	I. <140 hour/month	1.98 (0.02)	0.000	0.005	0.036
	II. 140–180 hour/month	2.04 (0.01)			ref
	III. 180–205 hour/month	2.12 (0.02)			0.000
	IV. 205–220 hour/month	2.25 (0.04)			0.000
	V. ≥220 hour/month	2.26 (0.06)			0.001
Anxiety	I. <140 hour/month	1.83 (0.02)	0.000	0.008	0.029
	II. 140–180 hour/month	1.89 (0.01)			ref
	III. 180–205 hour/month	2.01 (0.02)			0.000
	IV. 205–220 hour/month	2.17 (0.04)			0.000
	V. ≥220 hour/month	2.17 (0.05)			0.000
Depression	I. <140 hour/month	1.77 (0.02)	0.000	0.003	1.000
	II. 140–180 hour/month	1.78 (0.01)			ref
	III. 180–205 hour/month	1.85 (0.02)			0.000
	IV. 205–220 hour/month	1.95 (0.04)			0.000
	V. ≥220 hour/month	1.96 (0.05)			0.008
Fatigue	I. <140 hour/month	2.04 (0.02)	0.000	0.004	1.000
	II. 140–180 hour/month	2.05 (0.01)			ref
	III. 180–205 hour/month	2.07 (0.02)			1.000
	IV. 205–220 hour/month	2.30 (0.04)			0.000
	V. ≥220 hour/month	2.33 (0.06)			0.000
Physical complaint	I. <140 hour/month	1.75 (0.01)	0.074	0.001	1.000
	II. 140–180 hour/month	1.75 (0.01)			ref
	III. 180–205 hour/month	1.76 (0.01)			1.000
	IV. 205–220 hour/month	1.83 (0.03)			0.052
	V. ≥220 hour/month	1.79 (0.04)			1.000

*Crude model and model 1 are shown in online supplemental materials.
†Model 2 was adjusted for sex, age, job type, employment type (regular employee or others),work style (shift work or no shift work), worksite and experience or no experience with COVID-19 emergencies in April 2020.
‡Partial eta squared.
§Bonferroni method.
¶Number of participants in each category is as follows: I: 2,454; II: 9,793; III: 2,287; IV: 424; V: 185.
AWH, average working hour; ref, reference; SE, standard error.