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Table 1 Sample size determination

From: Incidence and predictors of major adverse drug events among drug-resistant tuberculosis patients on second-line anti-tuberculosis treatment in Amhara regional state public hospitals; Ethiopia: a retrospective cohort study

Assumptions

Probability of event

Variables

Hazard ratio

Sample size

Power = 80%

Significant level (α) = 0.05

Allocation ratio 1:1

Two tailed

0.26

HIV co-infection

5.81

163

0.26

Extra-pulmonary TB

2.74

495