RP incidence is actually calculated from the splitting how many teenagers with RP and number of teens who educated at least one pregnancy (including people currently pregnant) increased because of the 100. RB prevalence while doing so was calculated of the isolating the number of teenagers having RB as well as the level of adolescents who knowledgeable one or more livebirth multiplied because of the 100. Deformalized survey loads was basically applied if you find yourself calculating the brand new prevalence.

We utilized the ptrendi plan inside Stata13 to perform Cochran–Armitage testing to determine the prevalence development each age bracket playing with the latest chi-square fact and you can fulfilling this new presumptions regarding an additive model. Cochran–Armitage try is a changed Pearson’s chi-square sample hence assesses the brand new connection anywhere between binary (we.age. RP and you can RB) and ordinal (i.age. year and years) groups. Multivariate logistic regression investigation which have communication outcomes to have years (we.e. age range playing with one another three and you will four kinds) and season try presented while using the constant pregnancy and you can birth just like the digital benefit parameters (we.age. yes or no). I mentioned new pattern anywhere between one or two straight survey age to identify and this episodes got extreme changes in prevalence. (more…)