I computed the fresh indicate, standard deviation and you will prevalence price of RP and you will RB a-year for each and every age group
RP frequency is calculated by the isolating just how many teens which have RP additionally the number of teens who experienced one or more maternity (in addition to those people already expecting) increased from the 100. RB frequency at the same time is computed by isolating the new quantity of adolescents with RB and the quantity of teens whom experienced a minumum of one livebirth multiplied from the 100. Deformalized questionnaire loads had been applied when you find yourself calculating the latest incidence.
We utilized the ptrendi package during the Stata13 to perform Cochran–Armitage tests to select the incidence trend each age bracket having fun with new chi-rectangular fact and you will appointment the new presumptions out of an ingredient design. Cochran–Armitage decide to try was a customized Pearson's chi-square attempt hence analyzes the brand new organization anywhere between binary (we.age.