Discriminative properties and validity of a health status questionnaire in obstructive airway disease patients: the Airway Questionnaire 20
OBJECTIVE: To evaluate the discriminative properties and validity of the Airways Questionnaire 20 (AQ20) in a sample of patients with airway obstruction and to compare its properties with those of the St George's Respiratory Questionnaire (SGRQ) and the Short Form 36 (SF-36).PATIENTS and METHOD...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | Brasil |
| Institución: | Universidade Federal de São Paulo (UNIFESP) |
| Repositorio: | Repositório Institucional da UNIFESP |
| Idioma: | español |
| OAI Identifier: | oai:repositorio.unifesp.br:11600/30165 |
| Acceso en línea: | http://www.archbronconeumol.org/en/discriminative-properties-validity-health-status/articulo-resumen/S1579212907601529/ http://repositorio.unifesp.br/handle/11600/30165 |
| Access Level: | acceso abierto |
| Palabra clave: | questionnaires quality of life health status statistics dyspnea chronic obstructive pulmonary disease |
| Sumario: | OBJECTIVE: To evaluate the discriminative properties and validity of the Airways Questionnaire 20 (AQ20) in a sample of patients with airway obstruction and to compare its properties with those of the St George's Respiratory Questionnaire (SGRQ) and the Short Form 36 (SF-36).PATIENTS and METHODS: A convenience sample of 47 subjects was recruited from among 61 consecutive patients referred to an outpatient clinic specialized in obstructive airway diseases. All subjects completed the AQ20, SGRQ, and SF-36. Other measures were the baseline dyspnea index (BDI), 6-minute walk test (6MWT) distance, spirometry, results of arterial blood gas analysis, and body mass index.RESULTS: the AQ20 showed very good correlation with the SGRQ total score (rho=0.84, P <.001) and moderate correlation with all SF-36 domains (physical capacity, rho=-0.53; physical functioning, rho=-0.61; bodily pain, rho=-0.55; general health, rho=4.59; vitality, rho=-0.55; social functioning, rho=-0.57; emotional role functioning, rho=-0.51; mental health, rho=-0.61; all P <.001). the BDI and the 6MWT distance were the best predictors of AQ20 score (r(2)=0.31) in the regression model. An area under the receiver operating characteristic curve of 0.91 (P <.001) indicated a high level of accuracy for the AQ20, using the SGRQ as the gold standard.CONCLUSION: This study shows that the AQ20 is an accurate health status questionnaire in patients with moderate-to-severe airway obstruction. It could be an alternative to longer, traditional questionnaires such as the SGRQ. |
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