An audit of oral glucose tolerance tests at a large teaching hospital: indications, outcomes and confounding factors

摘要

Australian guidelines on the diagnosis of type 2 diabetes mel-litus (DM) recommend an oral glucose tolerance test (OGTT) in people with a fasting plasma glucose (FPG) concentration of 5.5 - 6.9 mmol/l or a random plasma glucose (RPG) of 5.5 - 11.0 mmol/l. FPG is the preferred initial test for DM as well as the preferred confirmatory test for a previous abnormal glucose result. However, this diagnostic strategy differs from that used in other countries: the American Diabetes Association does not recommend routine use of OGTT to diagnose DM, and the World Health Organisation recommends OGTT for FPG between 6.1 and 6.9 mmol/l.