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Kim, Lee, Kim, Lee, Lim, Cho, Jeong, Kim, Hwang, and Lee: The Usefulness of the Chronic Obstructive Pulmonary Disease Assessment Test
Original Article
Tuberculosis and Respiratory Diseases

Tuberculosis and Respiratory Diseases 2011; 71(4): 271-277.

Published online: 31 October 2011

DOI: https://doi.org/10.4046/trd.2011.71.4.271

The Usefulness of the Chronic Obstructive Pulmonary Disease Assessment Test

Yu Eun Kim, M.D., Sang Su Lee, M.D., Cha Young Kim, M.D., Seung Hun Lee, M.D., Su Jin Lim, M.D., Yu Ji Cho, M.D., Yi Yeong Jeong, M.D., Ho Cheol Kim, M.D., Young Sil Hwang, M.D., Jong Deog Lee, M.D., Ph.D.

Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea.

Address for correspondence: Jong Deog Lee, M.D., Ph.D. Division of Pulmonology and Allergy, Department of Internal Medicine, Gyeongsang National University College of Medicine, 92, Chilam-dong, Jinju 660-751, Korea. Phone: 82-55-750-8611, Fax: 82-55-758-9122, ljd8611@empal.com

Received 14 July 2011       Accepted 6 September 2011

Copyright © 2011. The Korean Academy of Tuberculosis and Respiratory Diseases. All rights reserved.

Abstract

Background

A chronic obstructive pulmonary disease (COPD) assessment test (CAT) has recently been developed as a short and simple method for assessing the quality of life in COPD patients. The object of this study was to assess the usefulness of the Korean version of the CAT for assessing COPD patients in an outpatient clinic.

Methods

The study included 60 COPD patients in a stable state from an outpatient clinic. The authors investigated the frequency of acute exacerbation during aprevious year through reviewing medical records. We evaluated the spirometry test, a 6-min walk distance test, and obtained the MMRC dyspnea scale, the Korean version of the CAT, and the BODE index at the time of visit. To assess the usefulness of the CAT, correlations between the CAT and other methods were evaluated.

Results

The mean age of patients was 68.3±8.6 years and 95% of patients were male. There was a significant correlation between the CAT score and FEV1% (r=-0.323, p=0.012), the frequency of acute exacerbation (r=0.292, p=0.024), the MMRC dyspnea scale (r=0.554, p<0.001), the BODE index (r=0.380, p=0.003), and 6 MWD (r=-0.372, p=0.004). The mean CAT score increased according to the GOLD stage (stage 1, 10.7±4.5; stage 2, 13.1±7.9; stage 3, 16.3±6.2; stage 4, 16.5±14.8; p=0.746).

Conclusion

The CAT was shown to be useful for the assessment of COPD severity. Therefore, the CAT is an easily applied and simple method for assessing COPD severity in an outpatient clinic.

Keywords: Body Mass Index, Pulmonary Disease, Chronic Obstructive, Disease Progression, Quality of Life

Figures and Tables

Figure 1
Correlation between COPD assessment test (CAT) and FEV1 (% predicted) (r=-0.323, p=0.012). COPD: chronic obstructive pulmonary disease; FEV1: forced expiratory volume in one second.
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Figure 2
Correlation between COPD assessment test (CAT) and frequency of acute exacerbation (r=0.292, p=0.024). COPD: chronic obstructive pulmonary disease.
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Figure 3
Correlation between COPD assessment test (CAT) and MMRC dyspnea scale (r=0.554, p<0.001). COPD: chronic obstructive pulmonary disease; MMRC: modified medical research council dyspnea scale.
trd-71-271-g003
Figure 4
Correlation between COPD assessment test (CAT) and 6 MWD (m) (r=-0.372, p=0.004). COPD: chronic obstructive pulmonary disease.
trd-71-271-g004
Figure 5
Correlation between COPD assessment test (CAT) and BODE index (r=0.380, p=0.003). COPD: chronic obstructive pulmonary disease; BODE: body mass index, degree of obstruction, dyspnea, exercise capacity.
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Table 1
The baseline characteristics of study population
trd-71-271-i001

BMI: body-mass index; PY: pack-years; FEV1: forced expiratory volume in one second; FVC: forced vital capacity GOLD: global initiative for chronic obstructive lung disease; MMRC: modified medical research council dyspnea scale; 6 MWD: 6-minute walk distance; BODE: body mass index, degree of obstruction, dyspnea, exercise capacity; SD: standard deviation.

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