Table 3

Fixed effect regression model regarding working hours in main job (annually) on scores of the Short Form 36 (SF-36) Mental Component Summary, the Household, Income and Labour Dynamics in Australia (HILDA) study, 2001–2012 (persons=18 420, observations=90 637)*

	Bivariate			Multivariate
	Coefficient	95% CI	p Value	Coefficient	95% CI	p Value
Usual hours worked
35–40 h	1			1
34 or under	0.01	−0.21 to 0.23	0.945	0.01	−0.19 to 0.22	0.897
41–48	−0.11	−0.31 to 0.10	0.301	−0.09	−0.28 to 0.09	0.336
49–59	−0.46	−0.72 to −0.21	<0.001	−0.52	−0.74 to −0.29	<0.001
60 over	−0.48	−0.82 to −0.13	0.007	−0.47	−0.77 to −0.16	0.003
Income	0.01	0.01 to 0.01	<0.001	0.01	0.01 to 0.01	0.003
Household structure
Couple without dependents	1			1
Couple with dependents	0.38	0.18 to 0.59	<0.001	0.26	0.05 to 0.47	0.015
Lone	−0.93	−1.26 to −0.61	<0.001	−0.99	−1.31 to −0.66	<0.001
Group/multihousehold	−0.42	−0.83 to −0.01	0.045	−0.48	−0.89 to −0.07	0.022
Lone with dependents	−1.32	−1.78 to −0.86	<0.001	−1.28	−1.74 to −0.82	<0.001
Long-term health condition	1−0.72	−0.95 to −0.50	<0.001	1−0.9	−1.11 to −0.70	<0.001
Age	0.08	0.06 to 0.11	<0.001	0.087	0.06 to 0.10	<0.001
Occupational skill
Low	1			1
Medium	0.78	−0.16 to 0.32	0.529	0.02	−0.20 to 0.24	0.856
High	−0.05	−0.32 to 0.22	0.722	−0.09	−0.34 to 0.17	0.506
Employment arrangement
Permanent	1			1
Casual/labour hire	−0.04	−0.24 to 0.16	0.691	0.06	−0.15 to 0.27	0.583
Fixed term contract	0.10	−0.13 to 0.33	0.414	0.12	−0.11 to 0.35	0.307
Self-employed	−0.05	−0.35 to 0.26	0.765	−0.05	−0.35 to 0.26	0.759
Constant	49.42	49.31 to 49.53	<0.001	46.65	45.86 to 47.45	<0.001

*Notes: 95% CI=95% upper and lower CIs, p value=significance value. Constant is for usual hours worked in main job. Average observations per person included in the analysis=5; maximum observations=12, minimum=2.