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Table 1 Summary of studies evaluating power grip

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

Study

Instrument

Unit of measurement

Handle position

Patient positioning

Agee et al., 1992 [9]

Jamar

%

all 5 settings

NR

Bhattacharya et al., 2004 [28]

Jamar

%

2

NR

Brown et al., 1993 [10]

Jamar

lbs

NR

NR

Brüser et al., 1994 [18]

Jamar

%

NR

NR

Citron and Bendall, 1997 [16]

Martin Vigorimeter

kpa

NR

NR

Dias et al., 2004 [29]

Jamar

kg

NR

Y

Dumontier et al., 1995 [14]

Jamar

kg

NR

NR

Erdmann, 1994 [11]

Jamar

lb

NR

NR

Ferdinand and Maclean, 2002 [22]

Baseline hydraulic

Ib

NR

NR

Foulkes et al., 1994 [12]

Jamar

lb

22

NR

Helm and Vaziri, 2003 [26]

Baseline hydraulic

kg

NR

NR

MacDermid et al., 2003 [24]

digit grip device1

kg

NR but cites refs

NR but cites refs

Mackenzie et al., 2000 [19]

Baseline hydraulic

kg

2

NR

Mackinnon et al., 1991 [8]

NR

kg

NR

NR

Nakamichi & Tachibana, 1997 [17]

NR

kg

NR

NR

Saw et al., 2003 [25]

Jamar

kg

NR

NR

Sennwald & Benedetti., 1995 [13]

Jamar

kg

2

NR

Trumble et al., 2002 [20]

Jamar

kg

all 5 settings

NR

Wong et al., 2003 [27]

NR

%

NR

NR

  1. 1NK Biotechnical Corp, Minneapolis, MN, USA;
  2. 2 data adjusted for age, sex, and side.
  3. % = percent change from preoperative value
  4. NR = not reported
  5. lb = pounds
  6. kpa = kilopastels
  7. kg = kilograms