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Burden of Informal Caregivers of Stroke Survivors: Validation of the Zarit Burden Interview in an African Population

Background: Informal care giving can be burdensome particularly where the option of institutionalized informal care scarcely exist. Objective: To look at the burden of informal caregivers of stroke survivors using the Zarit burden interview (ZBI). Method: 64 stroke survivors were assessed for demographics of age, gender, duration of follow-up since discharged from in-patient care, modified Rankin score at the time of discharge and at the time of evaluation for this study and the most important informal care giver at home was also assessed for whether care giving was telling on their health or life in any negative way. All the caregivers were subsequently assessed with the ZBI. Results: Mean age of most important informal care givers was 40.67 ± 14.27 years and the sex distribution was 33(51.6%) female and 29(45.4%) males. 21(32.8%) reported that caregiving was a health burden. Mean ZBI scores were significantly higher (30.19 ± 14.81 vs 20.30 ± 12.96, P < 0.01) in those that reported that caregiving was telling on their health. ZBI overall rating of burden of caregiving was also significantly associated with whether caregiving was telling on the health of caregiver (P = 0.01) and also symmetrically agreed with whether the burden of caregiving was telling on health (k = 0.33, P< 0.01). The sensitivity and specificity of ZBI were 70% and 68.4% respectively on ROC statistics (AUC = 0.67, P = 0.017). Conclusion: Reported burden of informal caregiving of about 33% is in our opinion huge. The moderate sensitivity and specificity of the ZBI means it could be safely used in the population studied.