The sample size was calculated by using Epi- info Version 7 statistical software with the assumptions of 95% CI, 5% margin of error, 80% power, exposed to unexposed ratio 1:1, 10% for incomplete records and an important variable of the study (passed appetite test) (P1):4% and adjusted hazard ratio (AHR:2.75) [23]. The total under-5 years aged SAM children admitted to TFU from January 2016—December 2019 at FHCSH were 1340. Unique chart numbers of SAM children were written on Microsoft excel. Then Simple random sampling technique was applied to select individual records using computer generation method and a random sample of 488 SAM children were selected.

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