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Evaluation of the COPD Assessment Test and GOLD patient types: a cross-sectional analysis

Authors Lopez-Campos JL, Fernandez-Villar A, Calero-Acuña C, Represas-Represas C, Lopez-Ramírez C, Fernández VL, Soler-Cataluña JJ, Casamor R

Received 12 February 2015

Accepted for publication 27 March 2015

Published 27 May 2015 Volume 2015:10(1) Pages 975—984

DOI https://doi.org/10.2147/COPD.S82781

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Richard Russell

Jose Luis Lopez-Campos,1,2,* Alberto Fernandez-Villar,3,* Carmen Calero-Acuña,1 Cristina Represas-Represas,3 Cecilia Lopez-Ramírez,1 Virginia Leiro Fernández,3 Juan Jose Soler-Cataluña,2,4 Ricard Casamor5

On behalf of the On-Sint study group

1Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocio/Universidad de Sevilla, Sevilla, Spain; 2CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain; 3Servicio de Neumología, Instituto de Investigación Biomédica de Vigo (IBIV), Complexo Hospitalario de Vigo, Vigo, Spain; 4Servicio de Neumología Hospital Arnau de Vilanova, Valencia, Spain; 5Departamento Médico de Novartis Farmacéutica, Barcelona, Spain

*These authors contributed equally to this work

Background: The COPD Assessment Test (CAT) has been recently developed to quantify COPD impact in routine practice. However, no relationship with other measures in the Global Initiative for Obstructive Lung Disease (GOLD) strategy has been evaluated. The present study aimed to evaluate the relationship of the CAT with other GOLD multidimensional axes, patient types, and the number of comorbidities.
Methods: This was a cross-sectional analysis of the Clinical presentation, diagnosis, and course of chronic obstructive pulmonary disease (On-Sint) study. The CAT score was administered to all participants at the inclusion visit. A GOLD 2011 strategy consisting of modified Medical Research Council scale (MRC) scores was devised to study the relationship between the CAT, and GOLD 2011 axes and patient types. The relationship with comorbidities was assessed using the Charlson comorbidity index, grouped as zero, one to two, and three or more.
Results: The CAT questionnaire was completed by 1,212 patients with COPD. The CAT maintained a relationship with all the three axes, with a ceiling effect for dyspnea and no distinction between mild and moderate functional impairment. The CAT score increased across GOLD 2011 patient types A–D, with similar scores for types B and C. Within each GOLD 2011 patient type, there was a considerably wide distribution of CAT values.
Conclusion: Our study indicates a correlation between CAT and the GOLD 2011 classification axes as well as the number of comorbidities. The CAT score can help clinicians, as a complementary tool to evaluate patients with COPD within the different GOLD patient types.

Keywords: chronic obstructive pulmonary diseases, multidimensional evaluation, comorbidities

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