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Journal of Hand Surgery (European Volume)
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Articles

Key Pinch in Healthy Adults: Normative Values

C. M. GÜNTHER
A. BÜRGER
M. RICKERT
C. U. SCHULZ

From the Department of Orthopaedics, Klinikum Grosshadern, Ludwig-Maximilian-University Munich, Munich, Germany

Correspondence: C.M. Gunther, Klinikum Grosshadern (Director: Prof. Dipl.-Ing. V. Jansson), Ludwig-Maximilian-University Munich, Marchioninistr. 15, 80377 Munich, Germany. Tel.: +498970953786; fax: +498970956790. E-mail: christian.guenther{at}med.uni-muenchen.de.

Intra-individual and inter-individual variations of key pinch strength were analysed in a standardised manner for healthy Caucasian adults (female n = 403; male n = 366) aged between 20 and 95 years. The mean strength was less in women (right 6.6 kg; left 6.1 kg) than in men (right 10.4 kg; left 9.7 kg). Independently of hand dominance or gender, the right side was about 7% stronger. Constitutional variables such as forearm length, forearm circumference and hand size showed a positive correlation with key pinch strength. Since the correlation between age and key pinch was similar in both genders, showing a continuous decrease of strength from the fifth decade of life on, key pinch seems independent from gender-specific hormonal changes. In conclusion, we recommend to side adjust measured values and to include information regarding constitutional characteristics for intra-individual comparison.

Key Words: thumb • key pinch • normative values

Journal of Hand Surgery (European Volume), Vol. 33, No. 2, 144-148 (2008)
DOI: 10.1177/1753193408087031
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