Table 1.

Final fit statistics for each PIPP subscale

Analysis	No. items	Item Fit Residual		Person Fit Residual		Chi-Square Interaction		Person Separation PSI
		Mean	SD	Mean	SD	Chi-square (df)	p
Impact
Self care	4	0.052	1.108	-0.398	1.103	9.305 (8)	0.317	0.932
Mobility	4	0.147	1.67	-0.378	.935	13.82(8)	0.086	0.92
Participation	4	0.285	0.510	-0.437	1.065	11.495 (8)	0.175	0.899
Relationships	4	0.004	1.156	-0.479	1.221	14.769(8)	0.064	0.955
Psychological	5	-0.164	0.388	-0.491	1.186	11.474(10)	0.32	0.900
Distress
Self care	4	-0.205	1.15	-0.498	1.033	12.13(8)	0.145	0.92
Mobility	4	0.182	0.634	-0.366	0.982	13.381(8)	0.099	0.884
Participation	5	0.252	1.402	-0.507	1.255	20.755(10)	0.023	0.936
Relationships	4	0.037	1.059	-0.399	1.051	11.163(8)	0.193	0.956
Psychological	5	-0.106	0.320	-0.538	1.195	6.731(10)	0.751	0.918
Ideal Value		0.000	1.000	0.000	1.000		>0.05	>0.7