Table 5.

Multiple regression predictors of MFSI-sf physical fatigue

	R	R 2	Adjusted R 2	Variables	β	P value
Step 1a	0.577	0.332	0.311	Age	0.111	0.311
				BMI	0.602	<0.001
Step 2b	0.664	0.441	0.414	Age	0.156	0.127
				BMI	0.494	<0.001
				CESD	0.355	0.001
Step 3c	0.665	0.443	0.396	Age	0.148	0.166
				BMI	0.492	0.001
				CESD	0.351	0.001
				AHI	−0.018	0.887
				ODI	0.040	0.695
Step 4d	0.685	0.469	0.395	Age	0.137	0.218
				BMI	0.438	0.003
				CESD	0.373	0.002
				AHI	0.230	0.395
				ODI	0.088	0.427
				% Stage 1 sleep	0.030	0.848
				% REM sleep	−0.133	0.236
				Resp movement	−0.334	0.261

^a F(2,63) = 15.681, p < 0.001, R ² change 0.332

^b F(3,62) = 16.312, p < 0.001, R ² change 0.109

^c F(5,60) = 9.537, p < 0.001, R ² change 0.002

^d F(8,57) = 6.299, p < 0.001, R ² change 0.026