Background: The aim is to evaluate the reliability and validity of the Croatian version of the Zarit Caregiver Burden Interview (ZBI) among the population of informal caregivers of long-term mechanically ventilated patients.
Subjects and methods: After a preliminary analysis, 25 participants were selected by using strictly defined criteria and they were asked to complete the Croatian version of the ZBI. The test - retest method was used for reliability assessment while an exploratory strategy of factor analysis was used to identify real-life existent subscales.
Results: After reliability and validity assessment, 3 items were removed from the original ZBI so that the Croatian version of the ZBI consists of 19 items. Internal consistency, observed through Cronbach's alpha for extracted subscales and for the whole questionnaire, were identified as high ranged from 0.875 to 0.922. Furthermore, exploratory factor analysis using Guttman-Kaiser criterion identified the 6 subscales for the ZBI.
Conclusions: Due to the fact that approximately 30 % of targeted population was included in the study, the Croatian version of the ZBI can be accepted as a reliable and valid tool for measuring burden among informal caregivers of long-term mechanically ventilated patients. Family caregiver's burden level assessment can be crucial to enhance outcomes associated with future caregiving.