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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)

Internal consistency
 Cronbach’s α0.8640.888
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 illness26 (18–31; 0–44)47 (33–56; 1–84)
 Caregivers without physical illness22 (12–29; 2–44)36.5 (20–55.5; 0–88)
Z−1.967− 2.508
Cohen’s kappa0.523< 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