Codes and Frequencies
For sample persons less than 6 months old who were ever breastfed (BREFEV) and whose respondent was their biological mother, BREFORMEV indicates whether the infant had ever been given formula or regular milk.
In the 1981 Field Representative's Manual, "regular milk" was defined as any kind of milk other than mother's or wet nurse's milk, such as cow's or goat's milk or powdered milk. Formula was defined as "a mixture or milk substitute which is fed to babies."
- 1981: Sample persons under 6 months old who were ever breastfed.
- 1981 : SAMPWEIGHT