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Measurement of Spatial Stability in Precision Grip
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What is the minimum clinically important difference in grip strength?

Jae Kwang Kim1, Min Gyue Park, Sung Joon Shin

  • 1Department of Orthopedic Surgery School of Medicine, Ewha Womans University, Seoul, Korea, kimjk@ewha.ac.kr.

Clinical Orthopaedics and Related Research
|May 13, 2014
PubMed
Summary
This summary is machine-generated.

The minimum clinically important difference (MCID) for grip strength after distal radius fracture surgery is a decrease of 6.5 kg. This finding is crucial for assessing treatment effectiveness and planning clinical trials.

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Area of Science:

  • Orthopedics
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • Grip strength is a key indicator of upper extremity function, frequently assessed in studies of upper extremity conditions.
  • The minimum clinically important difference (MCID) for grip strength, representing the smallest noticeable improvement, has not been previously established.
  • Distal radius fractures are common, impacting hand function and quality of life.

Purpose of the Study:

  • To compare 1-year post-surgery grip strength with pre-injury values in patients with distal radius fractures.
  • To determine the correlation between grip strength measurements and patient-reported outcomes.
  • To establish the MCID for grip strength and compare it to measurement error in this patient population.

Main Methods:

  • A cohort of 50 patients undergoing volar locking plate fixation for distal radius fracture was studied.
  • Grip strength was measured using a dynamometer at 1 year post-surgery and compared to estimated pre-injury levels.
  • Receiver operator characteristic curve analysis and minimal detectable change calculations were employed to determine MCIDs.

Main Results:

  • One year post-surgery, grip strength (23 kg) was significantly lower than estimated pre-injury values (28 kg).
  • Patient-reported grip strength weakness correlated well with measured grip strength changes (p = 0.56).
  • The MCID for grip strength was determined to be 6.5 kg (19.5%), which was not less than the minimum detectable change.

Conclusions:

  • The established MCID for grip strength after distal radius fracture is a decrease of 6.5 kg (19.5%).
  • This MCID value is valuable for evaluating the efficacy of novel treatments for distal radius fractures.
  • The findings aid in determining appropriate sample sizes for future clinical trials in this field.