NDLI: Validation of the Spanish version of the Asthma Control Questionnaire.

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Validation of the Spanish version of the Asthma Control Questionnaire.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Picado, César Badiola, Carlos Perulero, Nuria Sastre, Joaquin Olaguíbel, José María López Viña, Antolin Vega, J. M.
Spatial Coverage	Spain
Description	Country affiliation: Spain Author Affiliation: Picado C ( Department of Pneumology, Hospital Clinic, Barcelona, Spain.)
Abstract	BACKGROUND: The Asthma Control Questionnaire (ACQ) has not been validated in the Spanish population, and the fact that it requires spirometry poses an important limitation on its widespread use in the primary care setting in Spain. OBJECTIVE: The aim of this study was to evaluate the psychometric properties of the Spanish version of the ACQ. METHODS: In this multicenter, prospective study, consecutive adult patients with persistent asthma were recruited at 62 respiratory and allergy units across Spain. Patients were assessed at baseline and at weeks 2 and 6. The following clinical variables were recorded: lung function (forced expiratory volume in 1 second [FEV(1)]), symptoms, exacerbations, concomitant diseases, asthma severity according to the Global Initiative for Asthma international guideline, and asthma control as perceived by patients and physicians through direct ad hoc questions. The latter measures were derived specifically for this study. Patients self-completed the ACQ at all visits before the rest of the study variables were recorded. The ACQ's feasibility, validity, reliability, and sensitivity to change were assessed. Cross-sectional and longitudinal validity was assessed using the relationship between ACQ score and clinical parameters. Sensitivity to change was assessed by estimating the global effect size and the minimal important difference (MID). Reliability was assessed using estimation of the Cronbach alpha coefficient (CCalpha) and intraclass correlation coefficient (ICC). RESULTS: A total of 607 patients were included. The mean (SD) age was 45.6 (17.1) years and 61.4% of the patients were women. Of these 607, 235 (39%) had mild asthma; 246 (41%), moderate; and 126 (21%), severe. Mean (SD) time to complete the ACQ was 3.9 (4.4) minutes. The Pearson correlation coefficient in the relationship between ACQ and FEV(1) (% predicted value) was -0.23. ACQ was found to be significantly related to asthma severity and intensity and frequency of symptoms (coughing, wheezing, and dyspnea) (both, P < 0.001). Change in ACQ was significantly related to changes in FEV(1), intensity and frequency of symptoms, and number of exacerbations (all, P < 0.001). The global effect size of ACQ was 0.46 and the MID was 0.47 point of a maximum of 6. CCalpha was 0.90 and ICC was 0.86. CONCLUSION: In these adults with asthma in Spain, the Spanish version of the ACQ was found to be a reliable and valid questionnaire, suggesting that it can be used in this population as a discriminative and evaluative instrument.
File Format	HTM / HTML
ISSN	01492918
Issue Number	10
Volume Number	30
e-ISSN	1879114X
Journal	Clinical Therapeutics
Language	English
Publisher	Elsevier
Publisher Date	2008-10-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Pharmacology Anti-asthmatic Agents Therapeutic Use Asthma Drug Therapy Language Severity Of Illness Index Questionnaires Adult Female Humans Male Middle Aged Prospective Studies Psychometrics Reproducibility Of Results Spain Journal Article Multicenter Study
Content Type	Text
Resource Type	Article
Subject	Pharmacology Pharmacology (medical)

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