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Table 3 Responsiveness of power 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

Power grip

Nakamichi & Tachibana 1997 [17]

Dias et al 2004 [29]

 

CG

EG

CG

EG

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

23.6/16.5

24.2/19.10

17.8/18.5

18.7/17.8

Effect size

1.69*

0.85*

0.06

0.08

Mean pre-op/post-op at 12 weeks

23.6/19.4

24.2/21.6

17.8/20.5

18.7/20.7

Effect size

1.00*

0.43*

0.22

0.18

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