Step 3
Caregiving ability							−0.014	**	0.003
× Gait/Wheel chair							−0.014	**	0.003
ΔR²				0.065	**		0.006	**
Adj R²				0.227			0.233
4. Climbing stairs
Variable	Step 1			Step 2			Step 3
Variable	b		bSE	b		bSE	b		bSE
Step 1
RS	−0.065	**	0.006	−0.042	**	0.007	−0.040	**	0.007
c-FIM	0.012	**	0.001	0.012	**	0.001	0.012	**	0.001
Step 2
Caregiving ability				0.092	**	0.007	0.090	**	0.006
Climbing stairs				0.024	**	0.004	0.022	**	0.004
Step 3
Caregiving ability							−0.021	**	0.003
× Climbing stairs							−0.021	**	0.003
ΔR²				0.070	**		0.017	**
Adj R²				0.232			0.249