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Table 4 Responsiveness of key and tip pinch grip (effect sizes)

From: Power grip, pinch grip, manual muscle testing or thenar atrophy – which should be assessed as a motor outcome after carpal tunnel decompression? A systematic review

 

Key pinch

Tip pinch

 

Nakamichi & Tachibana 1997 [17]

Dias et al 2004 [29]

 

CG

EG

CG

EG

Mean pre-op/post-op at 6 weeks (kgs)

3.74/2.58

3.84/3.10

4.9/6.1

5.7/6.0

Effect size

1.02*

0.64*

0.46

0.14

Mean pre-op/post-op at 12 weeks

3.74/2.91

3.84/3.48

4.9/6.4

5.7/6.4

Effect size

0.73*

0.31*

0.58

0.33

  1. CG = comparator group, EG = experimental group
  2. * large effect size but change reflects a decrease in strength