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Quality of Life Research
Gepubliceerd in: Quality of Life Research 10/2015

07-04-2015

Does the COPD assessment test (CATTM) questionnaire produce similar results when self- or interviewer administered?

Auteurs: A. Agusti, J. J. Soler-Cataluña, J. Molina, E. Morejon, M. Garcia-Losa, M. Roset, X. Badia

Gepubliceerd in: Quality of Life Research | Uitgave 10/2015

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Abstract

Purpose

The COPD assessment test (CAT) is a questionnaire that assesses the impact of chronic obstructive pulmonary disease (COPD) on health status, but some patients have difficulties filling it up by themselves. We examined whether the mode of administration of the Spanish version of CAT (self vs. interviewer) influences its scores and/or psychometric properties.

Methods

Observational, prospective study in 49 Spanish centers that includes clinically stable COPD patients (n = 153) and patients hospitalized because of an exacerbation (ECOPD; n = 224). The CAT was self-administered (CAT-SA) or administered by an interviewer (CAT-IA) based on the investigator judgment of the patient’s capacity. To assess convergent validity, the Saint George’s Respiratory Disease Questionnaire (SGRQ) and the London Chest Activity of Daily Living (LCADL) instrument were also administered. Psychometric properties were compared across modes of administration.

Results

A total of 118 patients (31 %) completed the CAT-SA and 259 (69 %) CAT-IA. Multiple regression analysis showed that mode of administration did not affect CAT scores. The CAT showed excellent psychometric properties in both modes of administration. Internal consistency coefficients (Cronbach’s alpha) were high (0.86 for CAT-SA and 0.85 for CAT-IA) as was test–retest reliability (intraclass correlation coefficients of 0.83 for CAT-SA and CAT-IA). Correlations with SGRQ and LCADL were moderate to strong both in CAT-SA and CAT-IA, indicating good convergent validity. Similar results were observed when testing longitudinal validity.

Conclusions

The mode of administration does not influence CAT scores or its psychometric properties. Hence, both modes of administration can be used in clinical practice depending on the physician judgment of patient’s capacity.
vorige artikel Validation of the PROMIS physical function measures in a diverse US population-based cohort of cancer patients
volgende artikel QUAlity of Life Assessment in Spina bifida for Adults (QUALAS-A): development and international validation of a novel health-related quality of life instrument
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Metagegevens
Titel
Does the COPD assessment test (CATTM) questionnaire produce similar results when self- or interviewer administered?
Auteurs
A. Agusti
J. J. Soler-Cataluña
J. Molina
E. Morejon
M. Garcia-Losa
M. Roset
X. Badia
Publicatiedatum
07-04-2015
Uitgeverij
Springer International Publishing
Gepubliceerd in
Quality of Life Research / Uitgave 10/2015
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-015-0983-x

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