Global variation in diabetes diagnosis and prevalence based on fasting glucose and hemoglobin A1c

information on prior diagnosis of diabetes; (4) were 18 years of age or younger; (5) had not been measured for FPG or HbA1c by design or data were missing; (6) were from one specific area in one study in Pakistan with high prevalence of thalassemia; (7) were from follow-up rounds of studies that had multiple measurements of the same cohort over time; (8) had FPG 30 mmol/L or HbA1c 18%; (9) had implausible combinations of FPG and HbA1c as determined by the method of local outlier factor. Non-participationWe used all studies that met our inclusion criteria, which were designed to ensure participants of the surveys included were representative of the general population from which each sample was drawn. Information on response rate from individual participating studies is not available to us. RandomizationOur study is observational, and we did not carry out experiments. Reporting for specific materials, systems and methodsWe require information from authors about some types of materials, experimental systems and methods used in many studies. Here, indicate whether each material, system or method listed is relevant to your study. If you are not sure if a list item applies to your research, read the appropriate section before selecting a response. Materials & experimental systemsn/a Involved in the study