We used a two-sided design to test equivalence between groups. The sample size was calculated to detect equivalence at 4% phlebitis11 (equivalence margin 3%) with 5% signifi cance and more than 95% power
We used a two-sided design to test equivalence betweengroups. The sample size was calculated to detectequivalence at 4% phlebitis11 (equivalence margin 3%)with 5% signifi cance and more than 95% power