Evaluation of intra- and inter-rater reliability and concurrent validity of the Italian version of the Jebsen–Taylor Hand Function Test in adults with rheumatoid arthritis

Abstract

Introduction

In rheumatoid arthritis, a reduction in hand function can lead to a decrease in health, with a consequent limitation of daily life activities and restriction in social participation. Evaluation plays a decisive role in the functional recovery process and in rehabilitation programs. The Jebsen–Taylor Hand Function Test is one of the most widely used non-diagnosis-specific assessment tools in rehabilitation. The aim of the study was to evaluate the intra-rater and inter-rater reliability and concurrent validity of the Italian version of the Jebsen–Taylor Hand Function Test (JTHFT-IT) in a population with rheumatoid arthritis.

Methods

The test’s reliability and validity were assessed by following international guidelines. Its internal consistency and intra- and inter-rater reliability were examined using Cronbach’s alpha coefficient and the intraclass correlation coefficient, respectively. Its concurrent validity was evaluated using Pearson’s correlation coefficient with a dynamometer instrument.

Results

The test was given to 108 people with rheumatoid arthritis. Cronbach’s alpha reported a value of 0.91 for the dominant hand and 0.87 for the non-dominant hand. Intra- and inter-rater reliability were evaluated with a subgroup of 30 individuals. Intraclass correlation coefficients ranged from 0.46 to 1.00 in the dominant and non-dominant hands. Pearson’s correlation between subtests and the dynamometer ranged from –0.14 to –0.59.

Conclusions

The present study supports the use of the JTHFT-IT as a measure of hand functionality in people with rheumatoid arthritis. It is an important tool for Italian professionals and it can be useful both in clinical practice to evaluate improvement after rehabilitation treatments and for research in hand rehabilitation.

Keywords

Italian outcome measure rheumatoid arthritis reliability validity

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