Interactional effects of depressive symptoms and physical function on daily physical activity in ambulatory patients receiving hemodialysis

Table 2 Hierarchical multiple regression analyses of the association of physical function and depressive symptoms with PA

	Model 1		Model 2		Model 3		Model 4
	β	P₁	β	P₁	β	P₁	β	P₁
Age (years)	− 0.47	< 0.01	− 0.23	0.01	− 0.22	0.01	− 0.23	0.01
Sex	0.02	0.79	0.07	0.31	0.07	0.30	0.06	0.39
Body mass index (kg/m²)	− 0.04	0.68	0.02	0.86	0.02	0.80	0.04	0.62
Hemodialysis vintage (year)	− 0.06	0.43	− 0.07	0.30	− 0.07	0.28	− 0.06	0.37
Congestive heart failure (%)	− 0.15	0.02	− 0.10	0.06	− 0.10	0.05	− 0.10	0.05
Serum albumin (g/dl)	0.02	0.75	− 0.01	0.90	− 0.01	0.88	− 0.01	0.90
Hemoglobin (g/dL)	− 0.06	0.46	− 0.07	0.34	− 0.07	0.35	− 0.07	0.33
Physical function (m/s)			0.47	< 0.01	0.47	< 0.01	0.52	< 0.01
Depressive symptoms					− 0.04	0.52	− 0.08	0.23
Physical function*depressive symptom							− 0.13	0.03
R²		0.24		0.40		0.40		0.41
ΔR²				0.15		< 0.01		0.01
P₂				< 0.01		0.52		0.03

PA, physical activity; P1, P value for β; P2, P value for change in R²; R, the coefficient of determination. Physical function was evaluated at the usual walking speed (m/s)

ISSN: 2059-1381