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Table 1 Sample size determination

From: Prevalence and associated factors of circumcision among daughters of reproductive aged women in the Hababo Guduru District, Western Ethiopia: a cross-sectional study

Sample size determination by using prevalence of mothers having circumcised daughters’ (outcome variable)
Variables Assumptions N
Prevalence of mothers who had at least one circumcised daughter P = 23 %, d = 0.05, CI = 95 % \( n=\frac{1.96^2*0.23*0.77}{0.05^2}=272 \)
Sample size determination considering factors
Factors Assumptions n
Knowledge about ill effect of FGM OR = 0.02, P = 15 %, Ratio 1:1, Power = 80 %, CI = 95 % 128
Mothers circumcision status OR = 2, P = 49.6 %, Ratio 1:1, Power = 80 %, CI = 95 % 296