Sleep disturbances and psychomotor retardation in the prediction of cognitive impairments in patients with major depressive disorder

Table 2 Results of multiple linear regression analyses for the impact of depressive symptoms on different cognitive domains

		β	t	P value	R2	F	P value
Executive function	Retardation	-0.023	-0.850	0.396	0.096	20.31	0.029
	Cognitive disturbances	0.049	0.605	0.546
	Sleep disturbances	-0.235	-20.94	0.004
	Anxiety/somatization	0.076	0.901	0.369
	Weight loss	-0.017	-0.215	0.830
	Diurnal variation	-0.087	-10.10	0.273
	Hopelessness	-0.086	-0.959	0.339
Attention	Retardation	-0.01	-0.110	0.912	0.080	10.89	0.075
	Cognitive disturbances	0.113	10.37	0.172
	Sleep disturbances	-0.256	-30.17	0.002
	Anxiety/somatization	-0.028	-0.324	0.746
	Weight loss	-0.008	-0.102	0.919
	Diurnal variation	0.091	10.14	0.256
	Hopelessness	-0.053	-0.585	0.560
Processing speed	Retardation	-0.218	-20.37	0.019	0.095	20.30	0.029
	Cognitive disturbances	-0.006	-0.076	0.940
	Sleep disturbances	-0.160	-20.00	0.047
	Anxiety/somatization	-0.036	-0.428	0.670
	Weight loss	-0.001	-0.015	0.988
	Diurnal variation	0.083	10.05	0.297
	Hopelessness	0.001	0.007	0.995
Memory	Retardation	-0.113	-10.27	0.207	0.165	30.77	< 0.001
	Cognitive disturbances	0.067	0.843	0.401
	Sleep disturbances	-0.352	-40.52	< 0.001
	Anxiety/somatization	-0.045	-0.546	0.586
	Weight loss	0.052	0.670	0.504
	Diurnal variation	-0.062	-0.334	0.739
	Hopelessness	0.047	0.542	0.589