| MEASUREMENT PROPERTIES | |
| Limitations | |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Varni et al examined the reliability and validity of the PedsQL Rheumatology Module 3.0 in a sample of 231 children ages 5 to 18 years and 244 parents of these and additional children ages 5 to18 years. Parents and children (ages 8-18 years) self-administered the measures. An interviewer administered the measures to children ages 5 to 7 years. Cronbach’s α values across scales and forms generally demonstrated acceptable reliability for research, with the majority exceeding 0.70. Several parent proxy reports had a Cronbach’s α greater than than 0.90. However, Cronbach’s α values for the self-report in children ages 5 to 7 years were generally poor, limiting child self-report for this age range. |
| B. Reliability intraobserver or test-retest | Not Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
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| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
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| 2. VALIDITY | |
| A. Content validity: face validity | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
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| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
Varni et al demonstrated construct validity by using analysis of variance (ANOVA) to compare groups of children known to differ in the investigated health construct. These analyses found statistically significant differences across several different groups of children with different types of rheumatic diseases (eg, fibromyalgia versus other rheumatic diseases) for both the self-report. and proxy report, supporting construct validity. |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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