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Table 1 Final fit statistics for each PIPP subscale

From: Measuring the impact and distress of osteoarthritis from the patients' perspective

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