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Letter to the Editor

We are writing in response to the recent paper by Lin et al.1 , Artefactual inflation of type 2 diabetes prevalence in WHO STEP surveys. The overestimation of type 2 diabetes prevalence in some WHO STEPS surveys due to the use of incorrect blood glucose thresholds for point-of-care (POC) measuring devices was brought to our attention in 2015. A thorough review of all STEPS surveys, going back more than a decade, was immediately made to confirm for each survey whether the POC device displays whole blood or blood plasma values.