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)

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

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

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

ISSN: 1477-7525