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KIDDOBCDC_ET_ALL (B18_ET_X)
Child's day of birth (CDC) (Ethiopian calendar)
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KIDDOBCDC_ET_ALL (B18_x) is a 5-digit numeric variable.

Description

KIDDOBCDC_ET_ALL (B18_x) reports the century day code for the child's date of birth, according to the Ethiopian calendar. This variable is only available for Ethiopian samples.

Century day codes (CDC) are particularly useful for checking the consistency of dates, calculating intervals between events, and imputing dates when the information for an event is missing or partially complete. They are similar to century month codes (CMC), but century day codes provide additional detail.

According to the DHS Program's "Calculating the Age of Children More Precisely" documentation,

The century day code is analogous to the century month code and gives the number of days since the beginning of 1900. The century day code for a date of birth is computed in a similar manner to the century month code, using the reported day, month and year of birth, and the reported age in years for living children, as well as an imputation process for incompletely or inconsistently reported information. Note that for simplicity in the calculation of the century day code the assumption is that 1900 is a leap year, but this is also how Excel works too. This doesn’t affect any calculations of age as all calculations are using a consistent base.
Age in years is then calculated by subtracting the century day code for the date of birth from the century day code for the date of interview, and dividing the result by 365.25 (allowing for a leap year every 4 years) and taking the integer part of the result to get completed years. For age in months, divide the difference between the date of interview CDC and the date of birth CDC by 30.4375 (365.25 divided by 12 months), and then take the integer part to get completed months.

While KIDDOBCDC_ET_ALL is calculated basically the same way as INTDATECDC_ALL, using the number of days since 1900, KIDDOBCDC_ET_ALL uses the number of days since 1900 in the Ethiopian calendar. This corresponds to September 12, 1907 in the Gregorian calendar.

For more information about the calculation of century month codes, see INTDATECMC (V008).

Comparability

KIDDOBCDC_ET_ALL (B18_x) has no comparability problems.

All standard date variables in the Ethiopian DHS samples are given in the Ethiopian calendar. The Ethiopian year consists of 365 days, divided into 12 months of 30 days and one month of 5 days (6 days in a leap year). According to the Gregorian calendar, in a non-leap year, the Ethiopian year begins September 11 and ends the following September 10. The 13th month of the Ethiopian calendar falls in early September. In general, the Ethiopian calendar is 92 months behind the Gregorian calendar.

Comparability - Standard DHS

KIDDOBCDC_ET_ALL (B18_x) is included as a standard recode variable beginning in Phase VII (for Ethiopian samples).

Universe

  • Ethiopia 2016: Women age 15-49 with at least one birth.
  • Ethiopia: 2016-W, 2016-W