Age and life stage
Choose precision that matches the analysis.
Age is often useful for sampling and comparison, but an exact birth date is rarely necessary for an ordinary demographic survey. Non-overlapping age ranges are easier to answer and can reduce the visibility of unique respondents in a small dataset.
- Make every range mutually exclusive and collectively sensible for the audience.
- Use an exact age only when the analysis genuinely requires it.
- Consider household or caregiver questions when life stage matters more than age alone.