珪肺患者の換気機能障害の研究

概要

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The ventilatory function was discussed in this paper in analysis of a discrimination. The subjects were about 500 ceramic workers, ranged 45 to 60 years of age. Thirty slight silicosis were selected out of them who revealed nodi sporadically in the central field of the lung in roentgenogram. The other 30 cases who had no specific findings roentgenographically were taken as a control. Factorial elements used in discrimination analisis were X_1,X_2 and X_3, namely the value of the maximum breathing capacity, load index and air velocity index, respectively. The discrimination formula obtained were Y=0.016X_1-0.1446X_2+0.0242X_3 The individual discriminants were culculated by use of the above formula in all cases. The mean value of the discriminants of the control group was 8.68, while it was 6.82 in the silicosis cases. It indicated that the ventilatory function impaired in silicotic cases than that of normal control cases. When the screening was done by the rejection limits produced by the all individual discriminants, only one case was checked as an abnormal in the control group, while 11 cases was checked as an abnormal in the control group, while 11 cases were checked in the silicosis group.
社団法人日本産業衛生学会の論文