Reliability and validity of the Mongolian version of the Zarit Caregiver Burden Interview

[Purpose] Our study aimed to verify the reliability and validity of the translated Mongolian version of the Zarit Caregiver Burden Interview (ZBI). [Participants and Methods] We obtained the basic information of patients and their caregivers when they were hospitalized (Study 1). Subsequently, after the hospital discharged the patients, the caregivers answered the ZBI by telephone during the 4th and 5th weeks (Studies 2 and 3, respectively). To evaluate reliability, we calculated the correlation coefficient, compared the total scores of the ZBI obtained in Studies 2 and 3, and calculated Cronbach's alpha coefficient. To evaluate validity, we calculated the correlation coefficient of the score of item 22 and the sum of the scores of items 1-21. [Results] The correlation coefficient for reliability was high, and the difference between the two studies was insignificant. Cronbach's alpha coefficient was 0.92. The correlation coefficient was high for validity as well. [Conclusion] The Mongolian version of the ZBI has high reliability and validity.