We assumed that health facilities with low
CS rates and low intrapartum perinatal mortality had few
unnecessary CS and good maternal and perinatal outcomes.
Therefore, we selected this population to serve as reference
and base for mathematical modelling. To implement this
reasoning, we first calculated the facility-specific CS rate
and intrapartum-related perinatal mortality rate in each of
the 359 health facilities that participated in the WHO
MCS. Next, we identified the health facilities that would
have both low CS rates and low intrapartum perinatal mortality. Low CS rates and low intrapartum perinatal mortality were both relative to the facilities that participate in the
WHO MCS and defined as below the respective percentile
50. We selected this specific cut-off (i.e. percentile 50)
because the median is commonly used as a reference for
defining what is low or high in sufficiently large samples.
Thus, hospitals that presented both CS rates and
intrapartum-related perinatal mortality below the 50th percentile constituted the reference population (in Supporting
Information Appendix S1, Figure S2, Group ‘A’). We used
simple frequencies and proportions to describe essential
characteristics of the reference population.
We assumed that health facilities with lowCS rates and low intrapartum perinatal mortality had fewunnecessary CS and good maternal and perinatal outcomes.Therefore, we selected this population to serve as referenceand base for mathematical modelling. To implement thisreasoning, we first calculated the facility-specific CS rateand intrapartum-related perinatal mortality rate in each ofthe 359 health facilities that participated in the WHOMCS. Next, we identified the health facilities that wouldhave both low CS rates and low intrapartum perinatal mortality. Low CS rates and low intrapartum perinatal mortality were both relative to the facilities that participate in theWHO MCS and defined as below the respective percentile50. We selected this specific cut-off (i.e. percentile 50)because the median is commonly used as a reference fordefining what is low or high in sufficiently large samples.Thus, hospitals that presented both CS rates andintrapartum-related perinatal mortality below the 50th percentile constituted the reference population (in SupportingInformation Appendix S1, Figure S2, Group ‘A’). We usedsimple frequencies and proportions to describe essentialcharacteristics of the reference population.
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