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Table 3 Discriminative validity of different CHAQ revisions compared to the original CHAQ.

From: Comparing different revisions of the Childhood Health Assessment Questionnaire to reduce the ceiling effect and improve score distribution: Data from a multi-center European cohort study of children with JIA

   

T-test

Mann-Whitney U-test

 

CHAQ version

Score patients

Score controls

T statistic

P

U statistic

Z score

P

relative efficiency

CHAQ30orig

0.38 (0-2.13)

0 (0-0.63)

-7.52 (df 109)

<0.001

344

-4.84

<0.001

1.00

CHAQ30CATI

0.10 (0-1.62)

0 (0-0.23)

-6.90 (df 102)

<0.001

333

-4.92

<0.001

0.84

CHAQ38CATI

0.19 (0-1.84)

0 (0-0.26)

-7.56 (df 101)

<0.001

263

-5.33

<0.001

1.01

CHAQ30CATII

-0.033 (-1.69-2)

0 (-0.026-0.071)

2.37 (df 90)

0.02

509

-3.54

<0.001

0.10

CHAQ38CATII

-0.12 (-1.7-1.76)

0.013 (-0.052-0.42)

3.78 (df 107)

<0.001

403

-4.28

<0.001

0.25

  1. CHAQ scores for patients and controls are shown as median and range. Relative efficiency is the ratio of squared t-statistic with the original CHAQ (chaq30orig) as reference.
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Pediatric Rheumatology

ISSN: 1546-0096