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

Table 4.

Linear regression models of the relationship between RTQ‐10, sleep quality, and physical and mental fatigue

Step	Variable	R²	Adjusted R²	∆ R²	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	.24	.22	.06 ^c	.86	.61	.21	1.41	.17	−.36, 2.09
2 ^a	RTQ‐10 ^b				.06	.03	.33	2.24	.03	.006,.11
3 ^a	GAD status	.37	.34	.13 ^c	.41	.58	.10	.71	.48	−.75, 1.56
	RTQ‐10				.04	.02	.25	1.84	.07	−.004,.09
	Sleep quality ^b				−.85	.24	−.49		.001	−1.34, −.36
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	.25	.22	.05	1.21	.69	.26	1.76	.08	−.17, 2.58
2 ^a	RTQ‐10				.06	.03	.29	1.97	.05	−.001,.11
3 ^a	GAD status	.37	.34	.12 ^c	.71	.65	.15	1.09	.28	−.59, 2.01
	RTQ‐10				.04	.03	.21	1.55	.13	−.01,.10
	Sleep quality ^b				−.94	.27	−.39	−3.42	.001	−1.48, −.3

GAD status = non‐anxious (0) GAD (1); RTQ‐10 = Repetitive Thinking Questionnaire‐10.

^{^a}

Significant model.

^{^b}

Significant variable.

^{^c}

Significant ∆R ².