Table 1 Sample size calculation for the second specific objectives (associated factors) by using STAT CALC of EPI INFO version 7.2.4.0
S.No. | Associated factors/variables | % of outcome in the un exposed group | % of outcome in the exposed group | The ratio of unexposed to exposed | AOR | Power % | CI% | Calculated sample size (n) | Ref |
|---|---|---|---|---|---|---|---|---|---|
1 | Female toilets kept locked inside | 19.64 | 40.8 | 0.71 | 2.82 | 80 | 95 | 171 | [26] |
2 | learn about menstrual hygiene at school | 35.8 | 57.9 | 1.037 | 2.47 | 80 | 95 | 175 | [27] |
3 | Residence | 22.2 | 42.8 | 0.737 | 2.62 | 80 | 95 | 186 | [26] |