. 2014 Apr 15;1:3. doi: 10.1186/2054-9369-1-3

Table 3.

Stratified regression analysis of sleep disorder, acute stress and social support( α _in = 0.05, α _out = 0.10)

Procedure	Dependent variable	Variable	R ²	ΔR²	F	B	β
1	Sleep disorder	Acute stress	0.210	0.210	640.928⁽¹⁾	0.696⁽¹⁾	0.458⁽¹⁾
2	Social support	Acute stress	0.134	0.134	373.049⁽¹⁾	0.309⁽¹⁾	0.366⁽¹⁾
3	Sleep disorder	Social support	0.367	0.367	698.396⁽¹⁾	0.766⁽¹⁾	0.426⁽¹⁾
		Acute stress				0.459⁽¹⁾	0.303⁽¹⁾

Significance levels of hierarchical regression analysis: ⁽¹⁾ P < 0.01. β. Standardized regression analysis coefficient.