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Incidence of diabetes (new cases/100 person-years) by baseline HbA1c, where diabetes was determined by 1997 ADA criteria using FPG and 2hPG concentrations or by HbA1c ≥6.5% (48 mmol/mol). Results are shown for the original masked treatment phase (DPP with mean follow-up of 3.0 years) (A and C) and for the DPP plus long-term follow-up (total follow-up with median follow-up of 9.9 years) (B and D). Met, metformin; Plac, placebo.
