- Data for population characteristics like obesity rate is usually collected from surveys, such as the National Health and Nutrition Examination Survey (NHANES).
- NHANES is designed as a representative sample, but non-response can create imbalances in the data that need to be addressed with reweighting.
- Re-weighting adjusts for differences between the sample and the overall population by giving more weight to characteristics that are underrepresented in the sample.
- Non-response can lead to selection bias, which can make it difficult to draw precise conclusions from survey data.
Click HERE for original. Published December 5, 2022
