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KMID : 0381319860250020043
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Korean Journal of Occupational Health
1986 Volume.25 No. 2 p.43 ~ p.50
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Predicted Normal Forced Vital Capacity and One-Second Forced Expiratory Volume for Normal Adolescent Boys
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정치경/Chung, Chee Kyung
박정일/조영선/Park, Chung Yill/Cho, Yung Sun
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Abstract
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In order to establish the predicted normal values of some ventilatory parameters derived from the forced vital capacity curve in the form of regression equations based on a healthy male adolescent population, forced vital capacity(FVC), forced expiratory volume in one second(FEV_(1.0)) and the ratio of FEV_(1.0) to FVC(FEV_(1.0)/FVC, FEV_(1.0)％ and several independent variables such as age and anthropometric measurements were calculated to obtain the regression equations of these parameters.
The results were as follows:
1. FVC and FEV_(1.0) had closely positive correlations with age, height, weight and body surface area(r=0.727~0.902).
2. The three kinds of the regression equations for predicting normal values of FVC and FEV_(1.0) were derived from the multiple regression models using age and several anthropometric measurements as independent variables. There were no significant differences of multiple correlation coefficients and standard errors of estimate among the three equations.
3. Increasing rates of FVC and FEV_(1.0) with height in boys with 150 ㎝ and taller were significantly higher than those in boys less than 149 ㎝ tall. There were also significant differences for regression coefficients of FVC and FEV_(1.0) on height between these two groups.
4. The separate prediction equations and lower limits of normal for FVC and FEV_(1.0) were presented for normal adolescent boys. These equations were functions of height alone for boys less than 149 ㎝ tall and of both age and height for boys with 150 ㎝ and taller.
5. The value for the ratio of FEV_(1.0) was independent of age, height, weight and body surface area and the mean of this value was 85.0％ in normal adolescent boys.
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