Abstract
Introduction: Assessing the severity of acute asthma objectively is important to guide treatment. Peak Expiratory Flow Rate (PEFR) is used for this. Paediatric Asthma Score (PAS) is a user-friendly asthma score in children. Our aim was to validate the efficacy of PAS in comparison with PEFR for assessing severity of acute asthma.
 Methods: The study included 32 children in the age group of five to 14 years, with mild to moderate asthma exacerbation. The PEFR and the PAS were measured before treatment, 15 min, 30 min, and one hour after treatment, and at discharge. Paired t-test was used to establish construct validity by comparing pre-and post-treatment PEFR and PAS. The criterion validity was calculated by correlating pre-and post-treatment PASs with PEFRs.
 Results: The mean predicted PEFR improved with treatment by 22.35% (p < 0.001) by one hour. Pre- and post-treatment PASs significantly correlated with PEFRs. The correlation of pre-treatment PEFR and PAS was r = -0.491 (p = 0.004), that for post-treatment at 1hour was r = -0.505 (p = 0.003).
 Conclusions: The study validities the PAS as a measure of severity of asthma. The PAS is thus a simple alternative to the PEFR to estimate airway obstruction in children within the age group to five to 14 years with acute asthma exacerbations.
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