RP prevalence is computed of the dividing exactly how many adolescents which have RP while the number of teenagers whom experienced at least one maternity (also people already pregnant) increased because of the 100. RB incidence likewise are computed by isolating the new level of teenagers which have RB and the number of teenagers exactly who educated at least one livebirth increased by 100. Deformalized questionnaire weights were applied if you are calculating the fresh frequency.
We made use of the ptrendi plan in the Stata13 to do Cochran–Armitage tests to search for the incidence pattern for every age group playing with the brand new chi-square statistic and fulfilling the newest presumptions off an additive model. Cochran–Armitage attempt are a modified Pearson’s chi-rectangular attempt and this analyzes brand new connection anywhere between binary (i.elizabeth. RP and you may RB) and you may ordinal (we.age. season and decades) classes. Multivariate logistic regression investigation having communications effects to own years (i.e. age range using both around three and five kinds) and 12 months is held when using regular maternity and you can delivery because the binary lead parameters (i.elizabeth. yes or no). We measured the new development ranging from one or two successive survey age to determine and therefore episodes got tall alterations in prevalence. Additionally, we reviewed style using season and you can socio-geographical (we.elizabeth. part, variety of residence, and you can money list) telecommunications each age group. For the purpose of it research, i made use of the around three classification age bracket since this was brand new merely categorization and this desired a sufficient number of cases.
Abilities
Certainly women aged 15–24 decades which have at least one pregnancy (n = 7091), a large proportion (53.3%) had been located among the 22–24 12 months olds. Inspite of the short ratio https://kissbrides.com/hot-russian-women/ out-of teenagers seized of the studies, the new proportion off fifteen–18 season olds claimed about survey has increased over time regarding eight.64% (n = 107) when you look at the 1993 to help you % (letter = 213) when you look at the 2013 (find Dining table step one).
Trend analysis for every age bracket
Incidence trend off teenagers which have regular maternity from the Philippines out-of 1993 so you’re able to 2013 by the age group. Caption: This contour gift ideas the newest weighted frequency out-of frequent maternity playing with many years teams with (a) around three and (b) four kinds. Teams making use of the around three groups were fifteen–18 years old, 19–21 years old and you may twenty-two–24 yrs old given that four kinds and fifteen–sixteen yrs . old, 17–18 years old, 19–two decades dated, 21–twenty two yrs old and 23–24 years old, as illustrated because of the each range into graphs. The fresh new x-axis ‘s the survey 12 months install in chronological purchase because y-axis the brand new weighted incidence
Frequency fashion out of teenagers that have regular birth throughout the Philippines off 1993 in order to 2013 of the age bracket. Caption: It profile gifts the latest weighted incidence out-of repeated beginning using ages groups with (a) three and you will (b) four groups. Communities by using the three groups is 15–18 years of age, 19–twenty-one and you may 22–24 years of age as the five categories as well as fifteen–16 years old, 17–18 yrs . old, 19–20 years dated, 21–22 yrs . old and you can 23–24 years of age, since the illustrated from the each range to the graphs. Brand new x-axis ‘s the survey seasons establish from inside the chronological buy as y-axis brand new adjusted incidence
Similar show have been based in the regression study. New RP pattern among fifteen–18 seasons olds remained around intact all over most of the studies out of 1993 to 2013 [Chances proportion (OR) =0.93; 95% Depend on period (CI) =0.81–step one.07]. There clearly was the same trend out-of RB development within decades category (Or = 0.87; CI = 0.72–step 1.06) after the a noticeable escalation in frequency out-of 1993 so you’re able to 1998 (Otherwise = step 3.29; CI = step 1.25–8.62). Concurrently, the latest old age range displayed a significant refuse for RP and you will RB that have unadjusted ORs ranging from 0.83 so you can 0.87 (get a hold of Table dos). Analyses playing with four decades classes presented no significant difference regarding the trend in the past discussed. Trends one of fifteen–16 and you may 17–18 year old teenagers stayed undamaged, while a bringing down trend is noticeable for those old 19–20, 21–twenty two and 23–24.
