2.7 SAMPLING TECHNIQUE
A systematic random sampling technique was used for sampling.
Eligible and consenting pregnant women who presented at the antenatal clinic and satisfied the inclusion criteria were included in the research..
We calculated the sampling interval (k) as:
K= population size (N)/desired sample size (nf)
The average number of pregnant women per booking clinic was 62, and there were 14 booking clinics within the proposed study period.
Therefore, the population size = 62 × 14 = 868.
Sampling interval (k) = 868/292 = 3.
So, every third, sixth, and ninth consenting pregnant woman who met the inclusion criteria was enrolled until we completed the sample size.