. 2014 Jan 20;26:2. doi: 10.1186/2052-4374-26-2

Table 1.

Weekly working hours by study subjects’ characteristics

Variables		Total	Weekly working hours
Variables			≤40	40 < × ≤ 52	52 < × ≤ 60	>60
		N Mean ± SD^†	%^*Mean ± SD^†	%^*Mean ± SD^†	%^*Mean ± SD^†	%^*Mean ± SD^†
Total		3,699	29.7	39.7	19.7	10.9
Total		48.8 ± 12.5	36.8 ± 6.8	47.0 ± 2.8	57.1 ± 2.8	73.5 ± 11.0
Gender	Male	2,400	28.5	39.7	20.7	11.1
Gender		49.2 ± 12.7	36.7 ± 6.8	47.0 ± 2.8	57.1 ± 2.8	74.1 ± 11.9
	Female	1,299	31.8	39.9	17.8	10.5
		48.2 ± 12.0	36.9 ± 6.9	46.9 ± 2.8	57.3 ± 2.8	72.3 ± 8.7
Age	25-34	1,248	30.0	41.2	18.7	10.1
		48.7 ± 12.0	37.5 ± 6.3	47.0 ± 2.8	57.2 ± 2.8	73.4 ± 11.6
	35-44	1,139	28.9	40.5	19.9	10.7
		49.1 ± 12.8	36.7 ± 7.1	47.1 ± 2.7	57.0 ± 2.8	74.9 ± 11.7
	45-54	897	29.9	37.1	20.8	12.2
		49.0 ± 12.7	36.3 ± 6.9	47.0 ± 2.8	57.1 ± 2.8	72.4 ± 10.3
	55-64	415	30.4	38.8	19.5	11.3
		48.4 ± 12.6	36.0 ± 7.2	46.4 ± 2.7	57.3 ± 2.8	72.9 ± 8.3
Occupation	Non-manual	1,802	31.8	43.2	16.1	8.9
Occupation		47.8 ± 11.7	37.2 ± 6.6	46.7 ± 2.8	57.1 ± 2.8	73.6 ± 10.4
	Manual	1,897	27.6	36.5	23.0	12.9
		49.9 ± 13.1	36.3 ± 7.0	47.3 ± 2.7	57.2 ± 2.8	73.5 ± 11.4
Employment type	Regular worker	2,767	28.4	40.9	19.6	11.1
Employment type		49.1 ± 12.4	37.2 ± 6.6	46.9 ± 2.8	57.0 ± 2.8	73.9 ± 11.2
	Irregular worker	932	33.4	36.2	19.9	10.5
		48.0 ± 12.8	35.9 ± 7.3	47.0 ± 2.7	57.4 ± 2.8	72.5 ± 10.1
Shift work	No	3,330	30.3	40.0	19.3	10.4
		48.5 ± 12.4	36.7 ± 6.9	46.9 ± 2.8	57.1 ± 2.8	73.3 ± 11.0
	Yes	369	24.1	37.4	22.8	15.7
		51.6 ± 13.1	38.0 ± 5.1	47.2 ± 2.8	57.1 ± 2.7	74.8 ± 10.6
Tenure	≤1	988	28.9	41.0	18.8	11.3
(years)		49.0 ± 12.7	36.6 ± 6.7	47.1 ± 2.8	57.4 ± 2.8	74.0 ± 10.7
	1 < × ≤ 10	2,013	29.6	38.3	20.4	11.7
		49.1 ± 12.8	36.8 ± 7.1	47.0 ± 2.7	57.1 ± 2.7	73.5 ± 11.6
	>10	698	30.8	42.2	18.8	8.2
		47.8 ± 11.1	37.1 ± 6.2	46.8 ± 3.0	56.8 ± 2.8	72.6 ± 8.6

*: row percentage, †SD: standard deviation.