日本人の換気機能正常値に関する推計学的検討—1．男子健常例について

Statistical Analysis on the Normal Values of the Ventilatory Functions in Japanese Healthy Adults:1. Studies on the Male Subjects

緒言

　換気機能検査は呼吸器疾患の診断・治療のみでなく，労働管理，障害の認定，さらに健常例の活動能力と関連して呼吸機能の評価の方法として重視されている。

　換気機能の成績を評価するにあたり正常の範囲をいかに定めるかはきわめて重要であるが，従来の多くの正常植の報告は健常例から得た成績の平均値および標準偏差を示すにとどまり，正常限界値を設定した報告はほとんどみられない。

　いわゆる人間ドック症例の換気機能の成績^{25）26）27）}について，ここではより多くの健常とみなされた男子から得た成績を推計学的に処理し，日本人の健常男子の換気機能諸値を求めた。

The normal values of ventilatory functions were indicated through the results obtained from the pulmonary function tests carried out as the medical checkup program at Keio University Hospital.

One thousand eight hundred and thirty nine male adults ranging from 22 to 83 years of age, who revealed neither obvious complaints nor abnormal physical findings, were included.

Correlation coefficients based on the valia-bles measured were constructed.

Fractional lung volumes and ventilatory capacities were studied. The parameters on any particular age group demonstrated normal distribution. The mean values, the standard deviations and the 5% rejection limits, as for the diagnostic normal limits, by every ten-year age group were calculated for each measurement.

The regression equations for the ventilatory functions were constructed upon age and height.

2) Out of 1,839 males, 594 subjects without impaired ventilatory functions were picked up.

The mean values and the standard devia-tions by every ten-year age group were cal-culated for each measurement and the reg-ression equations were constructed.

3) These indivisual variations in ventila-tory measurements were analysed with rela-tion to age, obesity, smoking habits, cough, sputum, season, and the type of respirometer.