Table 3

Responsiveness of power grip (effect sizes)

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

CG = comparator group, EG = experimental group

* large effect size but change reflects a decrease in strength

Geere et al. BMC Musculoskeletal Disorders 2007 8:114   doi:10.1186/1471-2474-8-114