To determine the maximal static respiratory pressure among healthy Filipino schoolchildren.
The study was performed on 326 students from grade 3–6. Permission was obtained from the school principal, and informed consent and questionnaire on the clinical history were obtained from the parents. Physical examination was done and Nutritional status was assessed based on Waterlow's classification and Body mass index. Maximum Inspiratory (MIP) and Expiratory Pressures (MEP) were measured using an aneroid pressure manometer.
Results showed mean MIP of (−47.75 with SD of 8.633 and 95% CI of −46.81 to −48.69) and mean MEP of (52.47 with SD of 7.393 and 95% CI of 51.66 to 53.27). MIP and MEP in both sexes are strongly correlated with age, followed by weight and height. Prediction of Equations for MIP and MEP was derived using multiple linear regression analysis. For 8–10 years old: MIP = 2.655 (Age) + 0.076 (Weight in kg) −0.129 (Height in cm) + 33.358; MEP = 2.615 (Age) –0.26 (Weight) + 0.144 (Height) + 12.571; and for 11–13 years old: MIP (Male) = 2.342 (Age) + 0.983 (Weight) −0.597 (Height) + 69.092; (Female) = 2.694 (Age) + 0.044 (Weight) −0.091 (Height) + 32.49; MEP = 2.099 (Age) + 0.381 (Weight) −0.218 (Height) + 47.188.
The data obtained from this study has established MIP and MEP ranges in healthy Filipino school children ages 8–13. Age was found to be a good predictive variable followed by weight and height. Overall, there was no significant difference between MIP and MEP in both sexes. A predictive equation for MIP and MEP was formulated for the age group. Values derived from these prediction equations may allow interpretation of serial measurements of MIP and MEP to measure respiratory muscle strength over time.
The assessment of maximum static respiratory pressure is a simple and non-invasive clinical method for evaluating the strength of respiratory muscles and is important among patients at risk of developing respiratory failure.
Michelle Reley-Syquia, No Financial Disclosure Information; No Product/Research Disclosure Information