Error in Weighted Analyses and Reported Prevalence Rates

To the Editor I write to report errors in the Research Letter, “Trends in Obesity Prevalence Among Children and Adolescents Aged 2 to 19 Years in the US From 2011 to 2020,” published online first on July 25, 2022, and in the October 2022 issue of JAMA Pediatrics. The study examined changes in obesity prevalence among US youth using nationally representative data from the National Health and Nutrition Examination Survey (NHANES) for the years 2011 to 2020. On July 6, 2023, I was contacted by a researcher who alerted me that he was unable to replicate the prevalence estimates in this article. He shared that he could replicate the results by using nonwei ghted analyses but derived different estimates when using the NHANES weights. NHANES provides weights to make prevalence data nationally representative.
Source: JAMA Pediatrics - Category: Pediatrics Source Type: research