KIDDOBCDC_ALL (B18_X) is a 5-digit numeric variable.
KIDDOBCDC_ALL (B18_X) reports the century day code for the child's date of birth.
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,
For more information about the calculation of century month codes, see INTDATECMC (V008).
The century day codes reported in KIDDOBCDC_ALL are calculated using the Gregorian calendar.
Apart from universe differences, KIDDOBCDC_ALL (B18_X) has no comparability problems.
While all samples in KIDDOBCDC_ALL use the Gregorian calendar, certain countries use country-specific calendars. These countries (noted below) are excluded from KIDDOBCDC_ALL but are included in country specific variables:
- Ethiopia uses the Ethiopian calendar: KIDDOBCDC_ALL_ET
- Nepal uses the Vikram Samvat: KIDDOBCDC_ALL_NP
KIDDOBCDC_ALL (B18_X) is included as a standard recode variable beginning in Phase VII.
- Women age 15-49 with at least one birth.