For children of multiple births, the birth date of the preceding child is the number of months since the end of the preceding pregnancy that ended in a live birth.ĭenominator: Children both surviving and dead who were born 0-59 months prior to the interview (b19 < 60 – see Changes over Time), excluding first-born children and their twins (see Percent distribution by months since preceding birth). The preceding birth interval is the difference between birth date of child and birth date of preceding child in months. Numerators: Preceding birth interval (b11) in single months. Median: Interpolated retrospective median Time period: Five years (0-59 months) preceding the survey (b19 < 60) Median number of months since the preceding birth for births in the five years preceding the survey. Median number of months since preceding birth Overall the preceding birth interval will be a month shorter in roughly half of the cases using the DHS-7 calculation rather than the prior method.įor more information on the changes in the calculation of age of children, months since birth, and the preceding birth interval, see Age of Children in Chapter 1.įE_BINT_C_I07, FE_BINT_C_I18, FE_BINT_C_I24, FE_BINT_C_I36, FE_BINT_C_I48, FE_BINT_C_I60 In prior rounds of The DHS Program, the preceding birth interval was just the difference in the CMC date of birth of the index child and the preceding child.
Due date calculator twins code#
Similarly, the calculation of the length of the preceding birth interval (b11) also changed in DHS-7, and is now calculated as the difference in the century day code (CDC) for the date of birth (b18) for the index child and the preceding child, in days, divided by 30.4375 to convert to months. The selection for births in the five years preceding the survey is based on b19 < 60 or, in datasets without b19, v008-b3 < 60. In prior rounds of The DHS Program, months since birth were calculated based on the date of birth in months as v008-b3. In DHS-7 recode files b19 provides months since birth for both living and dead children calculated from the date of birth in days. The calculation of months since birth has changed in DHS-7 compared to prior rounds of DHS. Not applicable-Birth dates of children are imputed if missing therefore birth dates do not have missing values.įirst-order births (and their twins) are excluded from both numerators and denominators.īirths in the month of interview are included and births 60 months before the interview are excluded. Numerators for each birth interval category are divided by the same denominator and multiplied by 100 to obtain percentages. For children of multiple births, the birth date of the preceding child is the number of months since the end of the preceding pregnancy that ended in a live birth. Preceding birth interval: (b11) Difference between birth date of child and birth date of preceding child grouped into the groups 7-17, 18-23, 24-35, 36-47, 48-59, and 60+ months. excluding birth_order = 1, where birth_order is calculated as follows: Numerator: Number of births whose interval with the preceding birth (b11) is within the specified groupĬovered births: Children both surviving and dead who have a difference between the date of interview and their birth date of 0-59 months (see Notes and Considerations), excluding first-born children and their twins, i.e. Time period: Five years preceding the survey (0-59 months) Population base: All second- and higher-order births in the time period (BR file or KR file) Percentage of births in the five years preceding the survey by specified grouped number of months since the preceding birth. Percent distribution by months since preceding birth
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