Greater than interval between birth and succeeding birth
Greater than interval between birth and date of interview by only 1 month
During pregnancy in calendar
NIU (not in universe)
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
PPABFLAG (M29) is a flag variable reporting the type of problem found when editing responses about the duration of mother's postpartum abstinence (in PPABMO), for mothers who had resumed sexual relations after the child was born (in the last three to five years). A code of 0 indicates no problem with the original response.