Concordance between fasting and 2‐h post‐glucose challenge criteria for the diagnosis of diabetes mellitus and glucose intolerance in high risk individuals

SUMMARY Aims  To compare the new fasting with the 2‐h post glucose challenge diagnostic criteria for diabetes mellitus in a high‐risk Central European population.Methods  The results of the 75‐g oral glucose tolerance tests (OGTT) performed between 1st January 1990 and 31st December 1998 in patients at high risk of glucose metabolism disturbance were analysed.Results  From 1554 patients with OGTT results available for the study, 1360 (759 women and 601 men, aged 65.5 ± 6.9 years, body mass index 28.2 ± 4.5 kg/m2) were included into the study. With the use of the post‐challenge criteria, 41.3% of the analysed population had diabetes or impaired diabetes tolerance (IGT), whereas with the new fasting system only 16.6% would have been be diagnosed with any type of glucose intolerance. Diabetes was significantly more often diagnosed with the post‐challenge criteria than with the fasting ones: 16.2 vs. 5.3% (P < 0.0001). The subjects with diabetes diagnosed upon fasting glucose value were significantly younger than the subjects with diabetes diagnosed according to the 2‐h glucose challenge: 65.7 ± 6.2 vs. 68.8 ± 7.0 years, respectively (P < 0.01). The sensitivity of the new criter