Sample size determination
This was calculated with intention to detect a minimum
difference of 10% in caesarean section rate between the
groups at 80% power and 5% level of significance. The
current caesarean section rate in UCH is 28.9%,12 and this
was used for sample size calculation, giving a minimum of
275 women. The difference between the groups was about
14%, signifying the specified power to detect this difference
at the level of significance.