Reliability and validity of functional health status and health-related quality of life questionnaires in children with recurrent acute otitis media.
In this study the reliability and validity of generic and disease-specific questionnaires has been assessed focusing on responsiveness. This is part of a study on the effects of recurrent acute otitis media (rAOM) on functional health status (FHS) and health-related quality of life (HRQoL) in 383 children with rAOM participating in a randomized clinical trial. The following generic questionnaires were studied: 1. RAND general health rating index, 2. Functional Status Questionnaire (FSQ Generic and FSQ Specific), 3. TNO-AZL Infant Quality of Life (TAIQOL), and the following disease-specific questionnaires: 1. Otitis Media-6 (OM-6), 2. Numerical rating scales (NRS) for child and caregiver (NRS Child and NRS Caregiver), and 3. a new Family Functioning Questionnaire (FFQ). Reliability was good to excellent (Cronbach's alpha range 0.80-0.90, intraclass correlation coefficient range 0.76-0.93). Moderate to strong correlations were found between the questionnaires as well as between questionnaires and relevant clinical indicators (r = 0.29-0.49), demonstrating construct validity. Discriminant validity for children with few versus frequent episodes of acute otitis media per year was good for most questionnaires (P < 0.004) but poor for the otitis media-related subscales of the TAIQOL (P = 0.10-0.97) and both NRS (P = 0.22 and 0.48). Except for the TAIQOL subscales, change scores were significant (P < 0.003) for generic and disease-specific questionnaires. Effect sizes were somewhat higher for disease-specific compared to generic questionnaires (0.55-0.95 versus 0.32-0.60) except for the TAIQOL subscales, which showed very poor sensitivity to change. Anchor-based methods resulted in a somewhat larger range of estimates of MCID than distribution-based methods. Combining distribution-based and anchor-based methods resulted in similar ranges for the minimally clinical important differences for generic and disease-specific questionnaires: 2-15 points on a 0-100 scale. Apart from the generic TAIQOL subscales, both generic and disease-specific questionnaires used in this study showed good psychometric qualities and responsiveness for use in clinical studies on children with rAOM.
Brouwer
Carole N M
CN
Department of Paediatrics, Spaarne Hospital, Postbus 770, 2130 AT Hoofddorp, The Netherlands.
Schilder
Anne G M
AG
van Stel
Henk F
HF
Rovers
Maroeska M
MM
Veenhoven
Reinier H
RH
Grobbee
Diederick E
DE
Sanders
Elisabeth A M
EA
Maillé
A Rianne
AR
D000208:Acute Disease; D000223:Adaptation, Psychological; D002648:Child; D002669:Child Welfare; D005260:Female; D006304:Health Status; D006306:Health Surveys; D006801:Humans; D008297:Male; D010033:Otitis Media / Q000523:psychology*; D011581:Psychological Tests; D011594:Psychometrics; D011788:Quality of Life; D012008:Recurrence; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires