Table 2.

Pearson's and Spearman's correlation coefficients of testosterone, cortisol, and measured factors in relation to sleep parameters.

	Slept hours		Hours in bed		Sleep efficacy (%)		Sleep quality
	Pearson's r	Spearman's r	Pearson's r	Spearman's r	Pearson's r	Spearman's r	Pearson's r	Spearman's r
Testosterone (ng/dL)a	0.13	0.10	−0.13	0.05	0.12	0.05	−0.10	−0.09
Cortisol (μg/dL)a	−0.11	−0.11	−0.32**	−0.10	0.13	−0.07	0.08	0.13
Age (years)	0.00	−0.01	0.14	0.15*	−0.18*	−0.13	0.10	0.06
Body mass index	−0.17*	−0.16*	−0.03	−0.19*	0.03	0.03	0.08	0.06
Depressive symptoms	−0.17*	−0.12	−0.11	−0.07	−0.05	−0.1	0.51**	0.53**
Working time (hours/week)	−0.07	−0.14	−0.07	−0.16*	0.05	0.05	−0.05	0.02
Job demand	−0.18*	−0.16*	−0.08	−0.13	−0.02	−0.1	0.16*	0.18*
Job control	0.03	0.04	−0.25**	−0.06	0.21**	0.10	−0.23**	−0.21**
Support from supervisor	0.11	0.10	0.16*	0.09	−0.03	0.00	−0.21**	−0.19*
Support from coworkers	0.12	0.11	−0.09	0.00	0.13	0.11	−0.32**	−0.31**

*p < 0.05; **p < 0.01.

a log transformed.