Table 1 Sample size determination of adult HIV patients on first line ART in Amhara regional referral hospitals; Ethiopia from September 2015 to December 2018
Assumptions | Probability of event | Variables | Hazard ratio | Probability of withdrawal | Sample size |
|---|---|---|---|---|---|
Power = 80 | 0.06 | Age 15–24 years | 4.4 | 0.1 | 265 |
Significance level(α) = 0.05 | 0.049 | Poor adherence | 3.25 | 0.1 | 513 |
Allocation ratio 1:1 | 0.09 | Duration of ART | 6.62 | 0.1 | 109 |
Two tailed | 0.06 | ART regimen change | 3.95 | 0.1 | 309 |