Parallel Comparison of Grip Strength Measures Obtained with a Microfet 4 and a Jamar Dynamometer

Repeated measures of grip strength obtained bilaterally with a Jamar and a MicroFET 4 dynamometer were compared. Measurements obtained with the MicroFET 4 tended to be slightly (2.2–3.1 lb.) higher but were highly correlated (r ≥ .96) with those obtained with the Jamar. Parallel reliability for the two devices was excellent (intraclass correlation coefficient ≥ .96). Although clinicians should be cautious about using the devices interchangeably, the MicroFET 4 appears to be a legitimate alternative to the Jamar dynamometer.