RP prevalence is calculated by the isolating the number of teens with RP and amount of teenagers whom educated one or more pregnancy (along with men and women already expecting) multiplied from the 100. RB incidence on the other hand try determined from the separating the new level of adolescents which have RB as well as the amount of teenagers exactly who experienced at least one livebirth increased by 100. Deformalized questionnaire loads were applied if you are calculating the newest prevalence.
I used the ptrendi bundle within the Stata13 to do Cochran–Armitage tests to search for the frequency pattern for each and every age group having fun with brand new chi-rectangular fact and you can conference this new assumptions from an ingredient design. Cochran–Armitage test is a changed Pearson’s chi-square try and this analyzes the latest organization ranging from binary (i.age. RP and RB) and ordinal (we.age. seasons and you will age) classes. Multivariate logistic regression investigation with communication outcomes for age (i.age. age groups using each other about three and you will four groups) and season try held while using repeated maternity and birth as binary result parameters (we.elizabeth. yes or no). I counted the new pattern anywhere between a couple successive survey many years to understand hence episodes had extreme alterations in prevalence. In addition, i examined style playing with season and you may socio-geographic (we.age. region, type of household, and you may wealth directory) communications for each and every age bracket. For the purpose of which data, i made use of the around three classification generation as this is the only categorization and therefore greet a sufficient number of instances.
Overall performance
Certainly one of female aged 15–24 decades with one pregnancy (n = 7091), the great majority (53.3%) was indeed discovered one of many twenty two–24 season olds. In spite of the quick ratio away from teenagers seized by studies, new proportion off 15–18 seasons olds claimed in the questionnaire has grown throughout the years out-of 7.64% (n = 107) when you look at the 1993 so you’re able to % (letter = 213) in the 2013 (find Table step one).
Development analysis for each and every age group
Incidence fashion out of adolescents which have constant pregnancy on Philippines of 1993 to 2013 by generation. Caption: This profile gift suggestions the fresh adjusted frequency out of constant maternity having fun with decades communities having (a) around three and you can (b) four classes. Groups utilising the about three groups are 15–18 yrs . old, 19–twenty-one and you can 22–24 years old just like the five categories also 15–16 yrs . old, 17–18 yrs old, 19–20 years old, 21–22 years of age and you may 23–24 yrs old, once the represented from the for every line on graphs. The fresh new x-axis is the questionnaire 12 months create for the chronological acquisition given that y-axis the new weighted frequency
Incidence trend out of teens which have regular beginning regarding Philippines regarding 1993 in order to 2013 from the age group. Caption: Which figure gift ideas this new adjusted prevalence regarding regular beginning using years teams which have (a) about three and (b) four classes. Teams why Balinese women so sexy using the around three categories were fifteen–18 yrs old, 19–21 years old and twenty-two–24 years of age because the four classes and fifteen–16 years of age, 17–18 yrs old, 19–2 decades old, 21–22 yrs old and you will 23–24 yrs . old, given that depicted from the per range for the graphs. The fresh x-axis is the survey year created when you look at the chronological acquisition since the y-axis this new adjusted prevalence
Equivalent results have been found in the regression data. The new RP development among 15–18 seasons olds remained very nearly unchanged across the surveys from 1993 in order to 2013 [Potential ratio (OR) =0.93; 95% Count on interval (CI) =0.8step one–1.07]. There’s an equivalent pattern of RB trend within age category (Otherwise = 0.87; CI = 0.72–1.06) following the an apparent escalation in frequency out-of 1993 so you’re able to 1998 (Otherwise = 3.29; CI = step 1.25–8.62). Concurrently, the newest older age range demonstrated a serious decline for both RP and you may RB having unadjusted ORs ranging from 0.83 to 0.87 (come across Table 2). Analyses using four ages groups demonstrated zero factor in the trends in the past discussed. Manner among fifteen–sixteen and 17–18 yr old teens remained intact, while a reducing development was obvious of these aged 19–20, 21–twenty two and you will 23–24.