Table 2.

Predictors of global sleep quality scores.

Variables	B**	t-statistic	p-value	95% CI of b
Trait physical energy	-0.168	-3.084	0.002	(-0.333,-0.074)
Trait physical fatigue	-0.093	-1.682	0.093	(-0.254, 0.020)
Trait mental energy	0.021	0.383	0.702	(-0.104, 0.155)
Trait mental fatigue	0.329	5.890	<0.001	(0.253, 0.506)
Moderate intensity PA	0.021	0.497	0.619	(-0.022, 0.038)
High Intensity PA	0.029	0.636	0.525	(-0.004, 0.007)
All other polyphenols	0.062	1.406	0.160	(-0.001, 0.007)
Number of servings of caffeine/week	0.108	2.557	0.011	(0.006, 0.043)
POMS vigor	-0.044	-0.890	0.374	(-0.086, 0.032)
POMS fatigue	0.213	3.786	<0.001	(0.076, 0.240)
POMS confusion	-0.014	-0.272	0.786	(-0.143, 0.108)
POMS tension	0.061	1.064	0.288	(-0.047, 0.158)
POMS depression	0.061	1.020	0.308	(-0.056, 0.177)
POMS anger	-0.113	-2.032	0.043	(-0.236,-0.004)
BMI	0.017	0.408	0.683	(-0.060, 0.092)
Age	-0.043	-1.007	0.315	(-0.104, 0.033)
Sex	0.055	1.308	0.191	(-0.146, 0.729)
Work-day mental work	-0.031	-0.724	0.470	(-0.004,0.002)
Off-day mental work	-0.027	-0.634	0.527	(-0.015, 0.008)

^**B = Standardized coefficient;

^*PA = Physical activity.