Flow-Volume 曲線による高齢者の呼吸機能に関する研究

概要

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Pulmonary function tests were performed on elderly men and women. Various pulmonary function test parameters were analyzed using flow-volume curves.The following results were obtained.1. Normal values for all groups over age 60 were recorded for pulmonary function data of all those subjects with %FVC>80% and FEV1.0%>70%.The FVC, FEV1.0 and PFR values for the 70-79 and 80-89 groups were significantly lower than for those in the 60-69 age group.2. The V50/H and V25/H values for smokers were lower than those for nonsmokers.3. Following a principal component analysis, a varimax rotation was applied to 9 pulmonary function test parameters to statistically assess their significance.Parameters which revealed obstructive factors were FEV1.0%, V50/H, MMF and V25/H. Lung volume was determined by %FVC, FVC and FEV1.0.4. The coefficients of variation for PFR, MMF, V75/H, V50/H and V25/H were significantly greater than those for %FVC, FVC, FEV1.0 and FEV1.0%.
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