. 2022 Jan 27;61(3):666–679. doi: 10.1111/bjc.12356

Table 3.

Linear regression models of the relationship between sleep quality and physical and mental fatigue

Step	Variable	R ²	Adjusted R ²	∆ R ²	B	SE B	β	t	p	95% CI
Model 1. Physical fatigue
1 ^a	GAD status ^b	.18	.17	.18	1.76	.48	.42	3.69	<.0001	.81, 2.71
2 ^a	GAD status ^b	.34	.32	.16 ^c	1.04	.47	.25	2.20	.03	.09, 1.99
2 ^a	Sleep quality ^b				−.92	.25	−.43	−3.77	<.0001	−1.41, −.43
Model 2. Mental fatigue
1 ^a	GAD Status ^b	.20	.19	.20	2.09	.53	.45	3.95	<.0001	1.03, 3.15
2 ^a	GAD Status ^b	.35	.33	.15 ^c	1.31	.53	.28	2.48	.02	.25, 2.37
2 ^a	Sleep quality ^b				−1.01	.27	−.42	−3.68	.001	−1.55, −.46

GAD Status = non‐anxious (0) GAD (1).

^{^a}

Significant model.

^{^b}

Significant variable.

^{^c}

Significant ∆ R ².