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.
For children born in the three to five years before the survey, ANVISNO (M14) reports the number of antenatal visits the mother had while the child was in utero. Children whose mothers did not see anyone for antenatal care during the pregnancy are coded 0.
The related variable ANVISNOTOP20 supplies the same material with a consistently applied top-code of 20+ visits.