Catalogue entry, not a second research report. The full research record remains at its original address:
How Often Does One Blood Pressure Reading Change the Category? NHANES 2021–2023
In a survey-weighted reanalysis of 6,100 adults with three complete readings, 16.4087% were assigned a different US blood-pressure category when their first office reading was compared with the mean of all three (95% design CI 15.36–17.45%). This is within-visit category disagreement, not a rate of hypertension misdiagnosis.
The original report contains the method, comparisons under alternative classification rules, limitations and the October 2026 verification update. Standalone reproduction code and the archived report (DOI 10.5281/zenodo.23342882) remain at their original links.
The original report is not externally peer-reviewed. This index entry exists only to make it discoverable from the Research archive; it should not be cited as an independent publication.