Comparison of the prevalence of type 2 diabetes mellitus (T2DM) in adults aged 25–64?years in selected Pacific Island countries using whole blood and plasma glucose cut?off points. Unit records of STEPwise approach to Surveillance (STEPS) surveys obtained from Fiji, Samoa, and Tonga Ministries of Health; T2DM prevalence recalculated using whole blood and plasma cut?off points. Shaded bars indicate T2DM prevalence based on correct glucose cut?off points for the glucose meter used (fasting blood glucose [FBG] ?6.1?mmol/L for early surveys1,3,5; fasting plasma glucose [FPG] ?7.0?mmol/L for later surveys),2,4,6 whereas open bars show T2DM prevalence based on incorrect glucose cut?off points (FPG ?6.1?mmol/L for later surveys).2,4,6