A study comparing the WHO C-Model caesarean section rates and observed caesarean section rates at Port Moresby General Hospital, Papua New Guinea.

The WHO C-Model had good predictability among most of the low-risk Robson groups that accounted for just over 80% of the study population. The suggested additional 111 caesarean deliveries needed to be performed among high-risk Robson groups represented 15% of the study population. Local hospital protocols pertaining to management of both low- and high-risk cases are credited for keeping CS rates to a minimum. A lower threshold for CS in Robson groups two and four could have led to better perinatal outcomes.