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KMID : 1101320040360020199
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Korean Journal of Clinical Laboratory Science
2004 Volume.36 No. 2 p.199 ~ p.204
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Correlations Between Height and Forced Expiratory Flow Curve Parameters
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Jin Bok-Hee
Park Sun-Young
Park Hyea-Lim
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Abstract
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Height has become one of the most important factors to determine the pulmonary function test index, and there is a high correlation between them, so that they have been utilized for evaluating pulmonary function test predictive value or nomogram. Therefore, we have tried to find out that difference and if there is any correlation and linear relationship between height and forced expiratory flow curve. There were a total of 163 subjects, male 93 and female 70. This study was done at the Department of Pulmonary Function Test of Jeon-Ju Presbyterian Hospital and we measured the index at the forced expiratory flow curve of FVC, FEV1.0, FEV1.0/FVC, FEF25-75%, and FEF200-1200㎖. When we subjected the group of height more than 160cm, there were gradual increments at FVC(p<0.001), FEV1.0(p<0.001), FEF25-75%(p<0.05) and FEF200-1200㎖(p<0.001), but no changes at FEV1.0/FVC in terms of forced expiratory flow curve index. We have analyzed the relationship between height and forced expiratory flow curve, there was a close relationship at FVC(r=0.670, p<0.01), FEV1.0(r=0.491, p<0.01), FEF25-75% (r=0.175, p<0.05) and FEF200-1200㎖(r=0.370, p<0.01) but there was reciprocal relationship at FEV1.0/FVC(r=-0.215, p<0.01). We have tried simple regression analysis to see if height affects forced expiratory flow curve index as a sector, and the result was FVC(ℓ)= 0.0642×height(㎝)－7.2978(p<0.01, R2=0.449), FEV1.0(ℓ)=0.0407×height(㎝)－4.2774 (p<0.01, R2=0.2411), FEV1.0/FVC(%) = －0.2892×height (㎝)+121.44(p<0.01, R2=0.0464), FEF25-75%(ℓ/sec)=0.0176×height(㎝)－0.7876(p<0.05, R2=0.0237), FEF200-1200 ㎖(ℓ/sec)=0.0967 ×height(㎝)－11.037(p<0.01, R2=0.1214) this was approved statistically. According to this study, if height is taller than average, forced expiratory flow curve index were increased, there was a close relationship between height and forced expiratory flow curve, and there was a linear relationship as sector between height and forced expiratory flow curve index. Therefore, researches that study other factors such as sex, age, weight, body surface area, and obesity indexes other than height should be done to see if there are any further relationships.
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KEYWORD
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Height, FVC, FEV1.0, FEV1.0/FVC, FEF25-75%, FEF200-1200㎖
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