Table 4.

Multiple regression predictors of MFSI-sf emotional fatigue

	R	R 2	Adjusted R 2	Variables	β	P value
Step 1a	0.425	0.181	0.155	Age	−0.001	0.991
				BMI	0.425	0.001
Step 2b	0.756	0.572	0.551	Age	0.085	0.341
				BMI	0.219	0.020
				CESD	0.672	<0.001
Step 3c	0.760	0.578	0.543	Age	0.073	0.428
				BMI	0.195	0.106
				CESD	0.665	<0.001
				AHI	0.000	0.998
				ODI	0.079	0.375
Step 4d	0.801	0.641	0.591	Age	0.139	0.133
				BMI	0.276	0.021
				CESD	0.628	<0.001
				AHI	−0.102	0.645
				ODI	0.048	0.628
				% Stage 1 sleep	−0.074	0.562
				Spont movement	0.326	0.003
				Resp movement	0.356	0.154

^a F(2,63) = 6.96, p = 0.002, R ² change 0.181

^b F(3,62) = 27.64, p < 0.001, R ² change 0.391

^c F(5,60) = 16.42, p < 0.001, R ² change 0.006

^d F(8,57) = 12.74, p < 0.001, R ² change 0.064