Reliability and validity of the Italian version of the hand functional disability scale in patients with systemic sclerosis
Articolo
Data di Pubblicazione:
2008
Citazione:
Reliability and validity of the Italian version of the hand functional disability
scale in patients with systemic sclerosis / F. Ingegnoli, V. Galbiati, P. Boracchi, D. Comi, R. Gualtierotti, S. Zeni, F. Fantini. - In: CLINICAL RHEUMATOLOGY. - ISSN 0770-3198. - 27:6(2008), pp. 743-749.
Abstract:
The English version of hand functional disability scale is a validated instrument
for measuring hand involvement in patients with systemic sclerosis (SSc). Because
validation of multiple-language versions of existing validated questionnaires
plays a key role in standardizing the outcome measurement and increasing the
statistical power of clinical studies, this study aims to validate a translated
Italian version of hand functional disability scale which is not available at the
moment. The Italian version of hand functional disability scale was tested on 50
patients with SSc. To determine test-retest reliability, 40 SSc patients were
asked to complete the questionnaire a second time within 2 weeks of the initial
testing session. The test-retest reliability and internal consistency were
determined by intra-class correlation coefficient (ICC) and Cronbach's alpha.
External consistency was measured by comparing with an already validated test,
the Health Assessment Questionnaire (HAQ), and clinical measurements. To explore
the relationships among these variables, multiple correspondence analysis (MCA)
was adopted. The statistical analysis of each domain and the total score revealed
a good test-retest reliability (ICCs > 0.75) and internal consistency (Cronbach's
alpha > 0.7). Furthermore, a good external consistency was confirmed by
evaluating the differences between the distributions of hand functional
disability scale score for SSc patients with or without hand involvement
(arthralgias, arthritis, flexion contractures, and digital ulcers) and comparing
results with those obtained for HAQ. Finally, MCA demonstrates a strong
correlation among functional disability scale areas and HAQ scores. The hand
functional disability scale is a self-administered questionnaire and it has been
specially developed to measure hand impairment in patients with hand disorders.
Our data support its validity and reliability in Italian SSc patients
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
hand functional disability scale ; systemic sclerosis
Elenco autori:
F. Ingegnoli, V. Galbiati, P. Boracchi, D. Comi, R. Gualtierotti, S. Zeni, F. Fantini
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