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Gepubliceerd in: Quality of Life Research 3/2013

01-04-2013

Parent-reported health outcomes in infants/toddlers: measurement properties and clinical validity of the ITQOL-SF47

Auteurs: Jeanne M. Landgraf, Ineke Vogel, Rianne Oostenbrink, Margriet E. van Baar, Hein Raat

Gepubliceerd in: Quality of Life Research | Uitgave 3/2013

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Abstract

Purpose

To derive and evaluate a shorter infant/toddler quality of life questionnaire (ITQOL) for use in clinical care.

Methods

Stepwise regression, factor analysis, and item-scaling principles were used to derive and guide item selection using data from a large general sample in the Netherlands (n = 5,211) and a “wheezing illness” sample (n = 138). Item internal consistency, discriminant validity, and floor and ceiling effects were evaluated using a general Dutch sample (Salland Region n = 410) and two clinical samples: Functional abdominal pain (FAP, n = 81) and Burn (n = 194). Reliabilities were estimated using Cronbach’s alpha. Relative precision (RP), the ability to distinguish between clinical subgroups, was computed by comparing the proportion of variance explained by the short-form scales versus respective full-length scales.

Results

The ITQOL was reduced from 97 to 47 items. Median alpha coefficients were 0.77 Salland sample, 0.76 (FAP), and 0.84 (Burn). Ninety-one to 100 % scaling successes for item discriminant validity were observed for 21 of 24 tests (8 scales, 3 samples). Floor effects were not observed; some ceiling effects were detected. RP estimates in the Salland sample ranged from 2.40 (physical abilities) to 0.58 (temperament and moods). RP estimates in the FAP sample were 0.85 (bodily pain), 1.36 (temperament and moods) and 1.62 (parental-impact emotional) and for Burn, 1.51 (temperament and moods) and 0.59 (general health perceptions).

Conclusion

The ITQOL-SF47 is reliable and valid and exceeds item-level scaling criteria.
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Metagegevens
Titel
Parent-reported health outcomes in infants/toddlers: measurement properties and clinical validity of the ITQOL-SF47
Auteurs
Jeanne M. Landgraf
Ineke Vogel
Rianne Oostenbrink
Margriet E. van Baar
Hein Raat
Publicatiedatum
01-04-2013
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 3/2013
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-012-0177-8

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