![]() ![]() The aim of this study is to present normal PEFR and to establish a PEFR equation for Thai children living in a suburban environment. In Thailand only one study has been undertaken and that focused on children living in an urban zone ( 17). Furthermore, when applying previous research to Thailand, it is evident that international studies cannot be used as an indicator to be used with confidence ( 8, 9, 12- 16). So, adult PEFR values do not correspond accurately to the PEFR values accorded to children. It can be difficult to perform the test due to lack of cooperation from the patient and be suboptimal, making it hard to interpret. Many factors including environment, ethnicity, socio-economic conditions, gender, and anthropometric features play a role in lung function differences, as reported by many studies ( 3, 4, 6- 11). The process is done by having the patient inhale to the optimum lung capacity and exhale to the maximum expiration ( 4, 5). PEFR is the maximum flow rate generated during a forceful exhalation, dependent on the strength of the thoracoabdominal muscle. Daily evaluation of PEFR is quite useful for monitoring and adjusting an asthmatic patient’s treatment ( 4, 5). The use of PEFR is cheaper, simple to use and portable ( 4). The peak expiratory flow rate (PEFR) is helpful for the monitoring of airway limitation as part of the Global Initiative for Asthma ( 1, 2). There are several tests available to evaluate the pulmonary function from a simple test such as spirometry and peak expiratory flow to the more complex and expensive tests such as wash-out of nitrogen, dilution of inert gases, and whole body plethysmography. Accepted for publication Oct 28, 2020.Ī pulmonary function test is an important tool in diagnosing respiratory diseases such as asthma, assessing disease severity, and to follow up with patients ( 1, 2). Keywords: Peak expiratory flow rate (PEFR) children asthma Height, weight, and age were the significant determiners of the PEFR for each sex in the regression equation. The data was obtained using the Wright peak flow meter. The regression equations are PEFR = (1.34 × height) + (1.41 × weight) + (16.56 × age) – 137.88 for males (R 2=0.751, P<0.001) and PEFR = (1.31 × height) + (0.94 × weight) + (7.30 × age) – 55.27 for females (R 2=0.507, P<0.001).Ĭonclusions: This research study has provided the normal range of PEFR for Thai children aged from 6 to 18 years in Phitsanulok. Females had a highly significant correlation between height and PEFR (r=0.532, P<0.001). For males, age was the strongest factor associated with PEFR (r=0.838, P<0.001). PEFR has a linear relationship in regards age, weight, height and BMI. A total of 1,920 healthy children were recruited between the ages of 6 and18 years. Results: A total of 2,000 students were initially examined 80 students were excluded from the study. ![]() All of the participants performed PEFR 3 times and the highest value was recorded. The children were instructed on how to use the Wright peak flow meter (Clement Clarke International Ltd.). The children were chosen to participate from five primary and secondary schools over the period from February 2014 to January 2015. It was conducted in Phitsanulok Province in the lower north of Thailand. Methods: This study includes a cross-section of healthy children aged 6 to 18. Many factors including geography, ethnicity, socio-economic conditions, gender, and anthropometric play a role in lung function differences studies have found. Interviews with Outstanding Guest Editorsīackground: Daily evaluation of peak expiratory flow rate (PEFR) is quite useful for monitoring and adjusting an asthmatic patient’s treatment.Policy of Dealing with Allegations of Research Misconduct.Policy of Screening for Plagiarism Process. ![]()
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