RP incidence was determined because of the dividing what number of teenagers with RP and also the number of teenagers who educated at least one maternity (as well as those individuals already pregnant) multiplied because of the 100. RB incidence on the other hand is calculated of the breaking up the brand new quantity of adolescents which have RB therefore the quantity of teens whom knowledgeable one or more livebirth multiplied from the 100. Deformalized survey weights was in fact used when you find yourself calculating the newest incidence.

I used the ptrendi package inside the Stata13 to do Cochran–Armitage tests to select the prevalence trend for each and every age group playing with brand new chi-square figure and you may meeting the fresh presumptions from an ingredient design. Cochran–Armitage shot is actually a customized Pearson’s chi-square test which assesses brand new relationship between digital (we.e. RP and RB) and ordinal (we.age. year and ages) kinds. Multivariate logistic regression data that have communications effects to have ages (i.age. age range using each other around three and you may four classes) and you can seasons is presented while using the frequent pregnancy and you can beginning as the digital lead details (i.elizabeth. sure if any). We mentioned new trend ranging from a couple consecutive survey decades to recognize and therefore symptoms got tall alterations in prevalence. Simultaneously, we analyzed trends having fun with year and you may socio-geographic (i.age. part, style of home, and you can riches directory) telecommunications each age group. For the intended purpose of this study, we utilized the three category generation that are the fresh new simply categorization and this enjoy a sufficient number of instances.

Results

One of women old fifteen–24 many years which have at least one maternity (n = 7091), the great majority (53.3%) was receive among 22–24 season olds. In spite of the short ratio away from teens captured from the surveys, the newest ratio regarding fifteen–18 season olds claimed on the survey has increased through the years regarding 7.64% (n = 107) in the 1993 so you’re able to % (n = 213) in 2013 (come across Dining table step 1).

Trend studies for each and every age bracket

Incidence styles regarding teenagers with repeated pregnancy regarding Philippines regarding 1993 in order to 2013 by age bracket. Caption: So it figure gift ideas this new weighted prevalence from frequent pregnancy playing with ages communities that have (a) three and you may (b) five groups. Groups using the around three kinds become fifteen–18 yrs . old, 19–21 years old and hottestwomen.net web siteleri you may 22–24 years old since the five kinds in addition to 15–sixteen yrs . old, 17–18 years old, 19–2 decades dated, 21–22 yrs . old and you may 23–24 years of age, as the represented by the for each line to the graphs. The brand new x-axis is the questionnaire season developed inside the chronological buy as y-axis this new adjusted prevalence

Incidence fashion out of teens with regular birth from the Philippines of 1993 in order to 2013 by age group. Caption: So it shape gifts the weighted incidence away from repeated birth playing with age groups with (a) about three and you can (b) four categories. Groups with the around three groups become 15–18 yrs . old, 19–21 years old and twenty two–24 years old just like the four kinds along with 15–16 yrs old, 17–18 yrs old, 19–two decades dated, 21–twenty two years old and you will 23–24 yrs . old, once the portrayed by the for each line towards graphs. The fresh new x-axis is the questionnaire 12 months set-up inside the chronological purchase as y-axis brand new weighted frequency

Similar overall performance were based in the regression analysis. The fresh RP development among 15–18 12 months olds stayed almost unchanged all over all of the surveys of 1993 in order to 2013 [Chances proportion (OR) =0.93; 95% Believe period (CI) =0.81–step one.07]. There is certainly a comparable pattern regarding RB trend in this years classification (Or = 0.87; CI = 0.72–step 1.06) pursuing the an obvious increase in incidence of 1993 so you can 1998 (Or = step three.29; CI = 1.25–8.62). At the same time, brand new elderly age range demonstrated a serious refuse both for RP and RB that have unadjusted ORs between 0.83 so you’re able to 0.87 (select Desk 2). Analyses having fun with four age kinds exhibited no significant difference about trend prior to now described. Trend certainly fifteen–16 and you may 17–18 year old adolescents stayed unchanged, while a lessening pattern was noticeable for these aged 19–20, 21–twenty two and you will 23–24.