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Table 4 Reliability and Validity of the FBIS-24 and ZBI-22(n = 292)

From: A comparison of psychometric properties of two common measures of caregiving burden: the family burden interview schedule (FBIS-24) and the Zarit caregiver burden interview (ZBI-22)

Property FBIS-24 ZBI-22
Internal consistency
 Cronbach’s α 0.864 0.888
Convergent validity
 Caregiver depression (PHQ-9) 0.505** 0.639**
 Caregiver anxiety (GAD-7) 0.494** 0.558**
 Family functioning (APGAR) −0.261** − 0.307**
 PLS functioning (GAF) −0.427** − 0.455**
Known groups’ validity
 Caregivers with physical illness 26 (18–31; 0–44) 47 (33–56; 1–84)
 Caregivers without physical illness 22 (12–29; 2–44) 36.5 (20–55.5; 0–88)
Z −1.967 − 2.508
P 0.049 0.012
Cohen’s kappa 0.523 < 0.001
  1. FBIS-24: 24-item Family Burden Interview Schedule; ZBI-22: 22-item Zarit Burden Interview; PHQ-9: Patient Health Questionnaire-9; GAD-7: Generalized Anxiety Disorder Scale-7; APGAR: Family Adaptation, Partnership, Growth, Affection and Resolve Index scale; GAF: Global Assessment of Functioning