Table 4.

Associations between work organization, perceived stress and sleep’s impact on work-life balance (controlled for age and length of tenure).

Predictor Variables	Wald X2	OR	95% CI
25 or less days on road/month (reference: 26 or more)	0.97	0.76	0.44, 1.31
11 or less work hours per day (reference: more than 11)	0.46	0.83	0.47, 1.44
Same daily schedule (reference: different)	1.49	0.63	0.30, 1.32
Same hours per day (reference: different)	0.38	0.84	0.47, 1.48
Same days per week (reference: different)	0.02	1.04	0.59, 1.83
Frequency of fast pace of work
Never or rarely	2.18	0.62	0.31, 1.18
Sometimes	0.02	1.05	0.53, 2.10
Often or always (reference)	-	-	-
Supervisor support
Often or always	0.22	1.32	0.43, 3.99
Sometimes	1.21	1.52	0.72, 3.23
Never or rarely (reference)	-	-	-
Perceived Stress
None or mild (reference)	4.18	0.45 *	0.21, 0.97
Moderate	4.72	0.45 *	0.22, 0.92
High or chronic stress	-	-	-

X = 34.39; p < 0.001; Cox and Snell R² = 0.15; Nagelkerke R² = 0.16; * p < 0.05.