Interviewer instructions
For age in years, write '0' if a baby is less than 1 year. If the respondent has difficulty in answering the question, compute the person's age from the reported date of birth. Note that age should be in completed years, or age at last birthday. Write '-' if the respondent don't know the age or it is impossible to calculate the age.
Question post text
Write '0' if less than one year of age, and " - " if don´t know