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Annual Congress of <strong>Malaysian</strong> <strong>Thoracic</strong> <strong>Society</strong><br />

OP 8<br />

Correlation Between GINA-defined asthma Control,<br />

Asthma Control Test and Lung Function Tests<br />

S Y Ooi, Y K Pang, C K Liam, K T Chua, C H Lee, B K Lim , N L Lai<br />

University Malaya Medical Centre, University of Malaya, Kuala Lumpur, Malaysia<br />

Introduction<br />

Assessment of asthma control remains contentious. Various assessment methods have been used.<br />

These include symptom assessment, lung function tests, questionnaires and laboratory investigations,<br />

e.g. exhaled nitric oxide. Global Initiative for Asthma (GINA) has recommended assessment based on symptoms<br />

and lung function tests. However, this strategy has not been validated in clinical trial.<br />

Objectives<br />

To assess the correlation between GINA-defined asthma control (G-AC) and the<br />

• Asthma Control Test (ACT) questionnaire<br />

• lung function tests (peak expiratory flow rate and spirometry)<br />

Methodology<br />

This is a prospective cross-sectional study conducted from 22 October 2010 till 10 June 2011 at the asthma<br />

clinic of University Malaya Medical Centre. Only patients seen by the specialists were recruited.<br />

A total of 70 asthmatics were recruited. Patients’ ages ranged from 13 to 82 years old (mean [SD], 58.24,<br />

[15.9]). Of these, 78.6% (55) were females and 21.4% (15) were males.<br />

Patients were categorised into well controlled, partially controlled and poorly controlled based on<br />

GINA-defined asthma control.<br />

One way-ANOVA test was used to examine the relationship G-AC and ACT, and between G-AC and lung<br />

function tests.<br />

Results<br />

1. There was statistically significant difference between well-controlled asthma or partially controlled asthma<br />

and poorly controlled asthma in term of their ACT scores.<br />

2. However, there was no statistical difference between well-controlled and partially controlled asthma.<br />

3. PEFR and Spirometry tests did not show statistical difference between the 3 asthma control groups.<br />

Conclusions<br />

1. If ACT is to be used in conjunction with other clinical assessment, it may suffice to distinguish between<br />

controlled and uncontrolled asthma status (without the category of partially controlled asthma).<br />

2. While PEFR and spirometry may be useful to assess asthma control over a course of time, one-off point<br />

assessment may not be useful in assessing asthma control.<br />

55

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