Cross-validation of the short version of the Japanese version of the Zarit Caregiver Burden Interview (J-ZBI_8)

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  • Kumamoto Keigo
    Research Unit for Nursing Caring Sciences and Psychology, National Institute for Longevity Sciences (NILS)
  • Arai Yumiko
    Research Unit for Nursing Caring Sciences and Psychology, National Institute for Longevity Sciences (NILS)
  • Ueda Teruko
    Research Unit for Nursing Caring Sciences and Psychology, National Institute for Longevity Sciences (NILS) Faculty of Service Industries, Department of Health and Social Services, University of Marketing and Distribution Sciences
  • Washio Masakazu
    Research Unit for Nursing Caring Sciences and Psychology, National Institute for Longevity Sciences (NILS) Department of Public Health, School of Medicine, Sapporo Medical University

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Other Title
  • 日本語版 Zarit 介護負担尺度短縮版 (J-ZBI_8) の交差妥当性の検討
  • ニホンゴバン Zarit カイゴ フタン シャクド タンシュクバン J ZBI 8 ノ コウサ ダトウセイ ノ ケントウ

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This study was aimed at confirming the cross-validity and construct validity of the short version of the Japanese version of the Zarit Caregiver Burden Interview (J-ZBI_8) developed by Arai and colleagues. A total of 169 family members caring for disabled elderly were assessed by a self-administered questionnaire which included the Japanese version of the Zarit Caregiver Burden Interview (J-ZBI).<br>Cronbach's alpha of the J-ZBI_8 was 0.88, indicating a high reliability of this instrument. A confirmatory factor analysis revealed that the two factor model of J-ZBI_8 fitted the data. Pearson's correlation coefficient between J-ZBI_8 and J-ZBI was 0.92; and the correlation coefficient between J-ZBI_8 and item 22 (a single global burden) was 0.66. These data indicated that J-ZBI_8 had a high concurrent validity.<br>The J-ZBI_8 was found to be significantly correlated with Barthel Index, duration of caring, hours of caregiving/day, physical fatigue and mental fatigue among caregivers, but not with the duration of caring (months). Caregivers of disabled elderly who did not have any behavioral disturbances had a significantly lower J-ZBI_8 score than those who were caring for elderly with such behaviors. Also, caregivers who declared that they did not abuse disabled elderly had a significantly lower J-ZBI_8 score than those who replied they abused them, when compared by t-test. These results indicated that J-ZBI_8 had a high construct validity.<br>It is concluded that the J-ZBI_8 had a high cross-validity and construct validity. This instrument can thus facilitate the assessment of family caregiver burden in clinical settings.

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