老人における栄養状態評価指標としての上腕計測値の検討

An Evaluation of Upper Arm Measurements used as Indicators of Nutritional Assessment in Aged Population

要旨

　老人の上腕計測値の加齢に伴う変化について検討するために，65歳以上の自覚的健康老人；A群(男性43名，女性69名)および老人健診受診者;B群(男性69名，女性132名)の2集団を対象として上腕計測を行い，以下の結果を得た．

1．男性は，全例では両群とも上腕囲(AC)，上腕皮下脂肪厚(TSF)，上腕筋囲(AMC)は加齢とともに減少していた．標準体重比80～120%等の健常者群でも，両健常者群とも，AC，AMCが加齢とともに減少しており，AMCの金らの標準値比は各々91％，92％で，筋蛋白量が軽度の消耗状態に近いと評価された．

2．女性は，全例では両群とも加齢とともに上腕計測値は減少していたが，健常者では両健常者群ともその傾向は認められなかった．

3．上腕筋囲の加齢に伴う変化に性差があることは，他の資料と合せて観察すると一層明瞭となった．加齢に伴う測定値の変化を明らかにするという点から，このことはより多数例について確認する必要がある．

Abstract

　The upper arm anthropometric parameters used in assessing protein-calorie malnutrition were measured and evaluated in elderly persons aged above 65 years. Subjects were two populations; population A , who felt well subjectively: 43 males and 69 females, and population B, who visited a clinic for legal health examination: 69 males and 132 females respectively. In males, for the total study group, measurements of arm circumference (AC), triceps skin fold (TSF), and arm muscle circumference (AMC) were reduced with aging in each population. For selected "healthy" subgroups, fulfilled criteria of weight within 20% of "ideal", and hemoglobin and other serum values within a specified range, AC and AMC decreased similarly with aging. AMC values of two male "healthy" subgroups were assessed at level of nearly "slight protein malnutrition", based on Japanese standard in Kon's report. In female both populations, for each total study group, three measurements of the upper arm decreased as subjects advanced in age, but for the "healthy" subgroups, decreases of those parameters were not observed. The difference of change of AMC with aging between males and females was more clearly compared with other published reports. It is pointed out that further inquiry should be necessary to confirm that difference in large subjects.