A Meta-Analytic Reliability Generalization Study of the Pediatric Voice Handicap Index.
Nuri Doğan, Mehmet Taha Eser, Damlasu Yağcıoğlu et al.
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In 30 seconds
This meta-analytic reliability generalization study assessed the reliability of the proxy-reported pediatric Voice Handicap Index (pVHI) and whether reliability varied with study characteristics. The analysis included 12 papers published between 2007 and 2022. The pooled mean reliability was approximately 0.916 [0.8840, 0.9401], above the study’s stated acceptable threshold of >0.70; mean stratified Cronbach’s alpha was roughly 0.95. However, reliability estimates varied substantially across studies (I² = 93.90%). The authors reported no differences by index language, participant group, or continent of origin.
Key findings
- Across 12 papers, mean pVHI reliability was approximately 0.916 [0.8840, 0.9401], exceeding the stated acceptable threshold of >0.70.
- Mean stratified Cronbach’s alpha was roughly 0.95.
- Reliability estimates showed substantial heterogeneity (Q ∼ (df = 11) ∼ = 163.6172, P < 0.0001; I² = 93.90%).
- Reliability was reported as consistent across index language, participant group, and continent of origin.
Why it matters
Reliability is important when interpreting scores from a proxy-reported measure of pediatric voice handicap. The pooled estimates support the pVHI’s consistency overall, while the marked between-study heterogeneity cautions that reliability may not be uniform across settings or samples. The findings help clinicians and researchers assess the measurement properties of the instrument without implying that it measures clinical change or outcomes.
What to keep in mind
The analysis included 12 papers, and reliability estimates varied substantially across studies.