Reliability of key pinch strength and Ⅱ to Ⅴ fingers palmar pinch strength measurement and clinical interpretation in young adults

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  • 若年成人の鍵ピンチ力，Ⅱ～Ⅴ指の指腹ピンチ力の信頼性と臨床的判断
  • ジャクネン セイジン ノ カギ ピンチリョク,Ⅱ~Ⅴ ユビ ノ シフク ピンチリョク ノ シンライセイ ト リンショウテキ ハンダン

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The purpose of this study is to clarify the key pinch strength and II to V fingers palmar pinch strength, the reliability of pinch strength measurement, the prediction method of pinch strength, and the clinical interpretation of the measured value. Measurements were performed 3 times over 2 days on 15 healthy young male and female adults. The correlation between dominant and non-dominant hand strength, grip strength, pinch strength, presence or absence of systematic error, and Minimal Detectable Change (MDC) were examined using the average value of three measurements. The Day-to-day Reliability was greater than 0.8 for all the pinch strength measurements, which was highly reproducible. When predicting the pinch strength, the predicting the dominant and non-dominant hands is the most reliable, while the dominant hand is 105～110% more predictable than the non-dominant hand. It is useful to use a key pinch strength of 13% and palmar pinch strength of 25% of the measured value as the true changes.

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