u5mr_cohort: Estimating under-five mortality using Maternal age...

In u5mr: Under-Five Child Mortality Estimation

Description

u5mr_cohort() uses the maternal age cohort-derived methods (MAC) through summary birth history information and maternal age (or time since first birth) to calculate the under-five mortality estimates.

Usage

u5mr_cohort(
  data,
  women = "women",
  child_born = "child_born",
  child_dead = "child_dead",
  agegrp = "agegrp",
  iso3 = "KHM",
  svy_year = 2010
)

Arguments

data	preprocessed data
women	total number of women
child_born	children ever born
child_dead	children dead
agegrp	age grouping or time since first birth
iso3	the iso3 code of the country from which the survey data come
svy_year	end of the survey

Details

In this cohort-derived method, under-five mortality and reference time are estimated through summary birth history information from the mothers and her age or time since her first birth.

In case sample weights are available for the mothers, final variables should be multiplied by these weights before summarizing.

Computational Procedure

Two formulas were used to quantify MAC method:

5q0 component

logit(5q0_ijk) = β_0i + U_ij + β_1i x logit(CD_ijk / CEB_ijk) + β_2i x CEB_ijk + β_3i x PR1 + β_4i x PR2 + ε_ijk

where

i = 5-year maternal age group ε (15-19, 20-24, ... , 45-49) j = country k = survey CD_i = total dead children from maternal age group i CEB_i = total children ever born from maternal age group i PR1 = ratio of parity among maternal age group 15-19 and parity among maternal age group 20-24 PR2 = ratio of parity among maternal age group 20-24 and parity among maternal age group 25-29 U_ij = country-specific random effects

All coefficients vary by maternal age group, as indicated by i and the random effects also vary by country, as indicated by j.

Reference time component

reftime_ijk

= β_0i + β_1i x (CD_ijk / CEB_ijk) + β_2i x CEB_ijk + β_3i x PR1 + β_4i x PR2 + ε_ijk

Value

data.frame

• iso3 - total number of women

• svy_year - total number of children ever born

• agegrp - five-year age groups

• ref_time - time between survey year and interpolated year

• year - reference year

• q5 - under-five mortality

References

Rajaratnam JK, Tran LN, Lopez AD, Murray CJL (2010) Measuring Under-Five Mortality: Validation of New Low-Cost Methods. PLOS Medicine 7(4): e1000253. (doi: 10.1371/journal.pmed.100025310.1371/journal.pmed.1000253)

Examples

## Example using fake survey data from Cambodia
data(cambodia)
camb <- u5mr_cohort(cambodia, women = "women", child_born = "child_born",
child_dead = "child_dead", agegrp = "agegrp", iso3 = "KHM", svy_year = 1234)

with(camb,
     plot(year, q5 * 1000, type = "b", pch = 19,
          col = "black", xlab = "Year", ylab = "U5MR per 1000 live births",
          main = paste0("Under-five mortality, q(5) in Bangladesh, estimated\n",
                       "using the maternal age cohort-derived method")))

u5mr documentation built on Sept. 9, 2021, 5:08 p.m.