目的　对口服葡萄糖耐量试验 (OGTT)诊断糖尿病 (DM )进行临床分析。方法　对 6 5 15例可疑糖尿病人行OGTT ,分别以空腹血糖 (FPG)≥ 7 0mmol/L和OGTT2h血糖 (PG2h)≥ 11 1mmol/L作为DM诊断标准 ,对结果进行比较、分析。结果　以FPG和PG2h为DM诊断标准 ,DM的患病率分别为 38 2 1%、5 2 34% ,符合率为 70 7% ,两个标准诊断DM并不一致 (χ2 =131 37,P <0 0 1)。结论　仅凭FPG诊断DM是不够的。以PG2h为DM诊断的金标准 ,诊断DM的理想FPG切点为 6 0mmol/L。当FPG≥ 6 0mmol/L时 ,一定要行OGTT ,以早期发现DM Objective To analyze the clinical data of oral glucose tolerance test (OGTT) in the diagnosis of diabetes mellitus (DM). Methods OGTT was performed in 6515 suspicious diabetic patients. The fasting blood glucose (FPG) ≥70mmol / L and OGTT2h blood glucose (PG2h) ≥11 1mmol / L were used as DM diagnostic criteria respectively. The results were compared and analyzed. Results The prevalence of DM was 38 2 1% and 5 2 34%, respectively. The coincidence rate was 70.7%. The two standard diagnostic DMs were not consistent (χ2 = 131 37, P <0 0 1). Conclusion The diagnosis of DM alone FPG is not enough. With PG2h as the gold standard for DM diagnosis, the ideal FPG point for diagnosis of DM is 60mmol / L. When FPG ≥ 60mmol / L, we must go OGTT to early detection of DM