Srpski arhiv za celokupno lekarstvo 2015 Volume 143, Issue 11-12, Pages: 688-694
https://doi.org/10.2298/SARH1512688M
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Assessment of the reliability of the Serbian version of the sickness impact profile questionnaire in patients with chronic viral hepatitis
Majstorović Biljana (Higher Health School of Professional Studies in Belgrade, Belgrade)
Janković Slobodan (Faculty of Medical Sciences, Kragujevac + Clinical Center of Kragujevac, Kragujevac)
Dimoski Zvonko (Higher Health School of Professional Studies in Belgrade, Belgrade)
Kekuš Divna (Higher Health School of Professional Studies in Belgrade, Belgrade)
Kocić Sanja (Faculty of Medical Sciences, Kragujevac + Public Health Institute of Kragujevac, Kragujevac)
Mijailović Željko (Faculty of Medical Sciences, Kragujevac + Clinical Center of Kragujevac, Clinic for Infectious Diseases, Kragujevac)
Introduction. Health-related quality of life (HRQL) of chronic patients has
been researched as the ultimate goal of modern treatment of chronic diseases
to improve patients’ quality of life. Objective. The objective was to assess
the reliability of the Serbian version of the Sickness Impact Profile (SIP)
questionnaire on the sample of patients with chronic viral hepatitis.
Methods. The research covered 102 patients with chronic hepatitis (47 type B
and 55 type C). The assessment of the reliability of the SIP questionnaire
was performed by testing the internal consistency of the questions by
calculating the Cronbach’s alpha coefficient. The factor analysis was used
to assess whether the grouping of the questions within dimensions matches
the distribution of the questions in the original English version of the
questionnaire administered to U.S. patient population. Results. The
Cronbach’s alpha coefficient for the entire questionnaire is 0.925, 0.869
for the physical dimension, and 0.857 for the psychosocial dimension. After
running a factor analysis of the psychosocial dimension, “emotional
instability” was extracted as the key factor, confirming the results of
previous research. Compared with the English version of the questionnaire,
the Cronbach’s alpha coefficient of the Serbian version does not diverge
significantly, whereas the factor analysis confirms the classification of
the questionnaire into two dimensions. Conclusion. Our study has shown that
the Serbian version of the SIP questionnaire is a reliable tool for
assessing the HRQL of patients with chronic hepatitis B and C before
starting treatment.
Keywords: Sickness Impact Profile (SIP), questionnaire reliability, chronic viral hepatitis