| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
In 108 patients with RA, the internal consistency was good, with a Cronbach’s α of 0.91 for the dominant hand and of 0.87 for the nondominant hand |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Test-retest reliability was moderate to excellent over the seven subsets in 26 individuals with stable hand disabilities (r = 0.60-0.99). In 11 healthy individuals, ICCs (0.88-0.99 for the dominant and nondominant hand) showed good test-retest reliability for the total score, in which simulated feeding scored lowest (ICC = 0.81 and 0.68). In this study, the reliability between three raters was good (ICC = 0.90 and 0.87). In 25 patients with RA, intraobserver and interobserver reliability was good (r = 0.82 and r = 0.91, respectively), although a learning or training effect was suspected |
| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
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| 2. VALIDITY | |
| A. Content validity: face validity | Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
Seven test items were selected to be representative of various hand activities, including some elbow and shoulder movements. Items were standardized so they could be administered in precisely the same way in each individual and so objective measurements of performance could be obtained. Items were tested on 300 normal individuals and on a group of 26 patients with stable hand disabilities, including neurologic disorders (n = 17), RA (n = 4), and other hand disorders (n = 5), and another group of 30 patients including patients with hemiparesis (n = 12), RA (n = 10), and quadriparesis (n = 11). Since its development, the JHFT has been widely used in patients (including children) with neurologic disorders and, to a lesser extent, in patients with RMDs. |
| B. Construct Validity: Structural validity |
Not Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
No studies have examined the construct validity of the JHFT. |
| C. Criterion validity | Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
The concurrent validity of the Modified Jebsen Hand Function Test (MJT) was examined with the University of Maryland Arm Questionnaire for Stroke (UMAQS), Nine Hole Peg Test (NHPT), and grip strength (measured by dynamometer) in a sample of 26 individuals with neurological disorders. The MJT showed excellent Pearson's correlation with the NHPT (r=0.86-0.88) and adequate with grip strength (r=0.44). Correlations between the MJT and UMAQS were not significant. |