RP incidence is computed because of the separating what amount of adolescents having RP and also the quantity of teens who knowledgeable one pregnancy (and those already expecting) multiplied from the 100. RB prevalence on the other hand try computed by dividing the fresh number of adolescents that have RB and level of teenagers just who knowledgeable at least one livebirth increased because of the 100. Deformalized questionnaire loads was indeed applied when you’re calculating the new incidence.

We used the ptrendi package in Stata13 to perform Cochran–Armitage evaluating to select the prevalence pattern for each and every age group having fun with the fresh new chi-square fact and you can meeting the latest assumptions off an ingredient model. Cochran–Armitage try was a changed Pearson’s chi-square test and therefore assesses the organization ranging from digital (we.e. RP and you will RB) and you will ordinal (i.age. season and you may decades) categories. Multivariate logistic regression studies with interaction outcomes to possess years (we.elizabeth. a long time playing with one another around three and you will five categories) and you will 12 months try held while using the constant pregnancy and you guams beautiful women may delivery due to the fact digital lead details (we.elizabeth. sure if any). I counted the newest trend ranging from several successive survey age to spot and this symptoms had tall alterations in prevalence. Concurrently, i examined manner having fun with seasons and you will socio-geographical (i.age. part, version of residence, and you can wide range index) interaction for every age bracket. For the purpose of this research, we made use of the around three classification age group because this are the new merely categorization and that anticipate an adequate number of cases.

Results

One of feminine old 15–24 age with at least one maternity (letter = 7091), the vast majority (53.3%) were located among the many twenty-two–24 year olds. Despite the brief proportion away from adolescents grabbed by studies, the ratio out of fifteen–18 year olds stated from the survey has increased over time from eight.64% (n = 107) for the 1993 so you’re able to % (n = 213) inside the 2013 (select Desk step 1).

Pattern study per age group

Prevalence trends from teens which have frequent pregnancy on the Philippines of 1993 in order to 2013 of the generation. Caption: This contour gifts the fresh new weighted prevalence out of regular pregnancy having fun with years teams which have (a) about three and you can (b) five kinds. Teams with the around three classes were fifteen–18 years old, 19–twenty one and you may twenty-two–24 years old while the five groups in addition to fifteen–16 years of age, 17–18 years of age, 19–2 decades dated, 21–22 years old and you will 23–24 years old, because the represented by per line to the graphs. Brand new x-axis is the questionnaire season setup during the chronological purchase because y-axis the brand new adjusted prevalence

Incidence styles out-of adolescents which have frequent delivery about Philippines from 1993 so you’re able to 2013 by age group. Caption: Which contour gifts the new weighted prevalence out of regular delivery playing with decades groups which have (a) three and you may (b) four categories. Communities utilising the around three kinds include 15–18 years of age, 19–21 years old and you can 22–24 years of age as the four categories and 15–16 yrs old, 17–18 yrs . old, 19–twenty years dated, 21–22 years old and you can 23–24 yrs old, since portrayed because of the each range into the graphs. The latest x-axis is the survey 12 months put up inside the chronological order given that y-axis this new adjusted incidence

Similar overall performance was basically found in the regression research. The new RP pattern certainly fifteen–18 12 months olds stayed practically unchanged around the every surveys from 1993 to help you 2013 [Chances ratio (OR) =0.93; 95% Believe interval (CI) =0.8step one–1.07]. There is certainly a similar development from RB trend within age category (Otherwise = 0.87; CI = 0.72–step one.06) after the an obvious boost in prevalence of 1993 to help you 1998 (Otherwise = step 3.29; CI = 1.25–8.62). Simultaneously, the older a long time shown a serious decline for RP and you will RB having unadjusted ORs between 0.83 to 0.87 (find Table 2). Analyses playing with five many years categories presented no significant difference regarding fashion before demonstrated. Manner certainly fifteen–16 and you will 17–18 year old teenagers remained intact, while a reducing trend try visible for these old 19–20, 21–twenty-two and you will 23–24.