Table 3.

Stepwise variable selection algorithm regression results for PSQI, HADS and perceived productivity

Dependent variables	Independent variables	(Constant)	Estimate
PSQI		12.48
	Male sex		−0.54
	Job satisfaction		−0.17
	Hypnotic medication use Never < 1/week 1–2/week ≥3/week		0.00 2.18 3.12 4.50
	Sleep hours		−1.13
	HADS		0.15
HADS		11.82
	Civil status Married Common law Single Divorced Widower		0.00 −2.28 −4.94 1.02 −1.36
	Weekly working days		1.03
	Quality of life		−1.70
	Antidepressant or anxiolytic medication use		2.51
	Hypnotic medication use Never < 1/week 1–2/week ≥3/week		0.00 −0.18 −5.28 −6.44
	PSQI		1.17
Perceived productivity		1.73
	Male sex		−0.92
	Job satisfaction		0.36
	Antidepressants and anxiolytic medication use		0.53
	Practice of regular physical activity		0.43