A study of the validity of one step (75 grams) oral glucose tolerance test as both screening and diagnosis gestational diabetes

This is a hospital based prospective clinical study was done in 250 antenatal women attending the out-patient Department of OBG, Government General Hospital, Kakinada. All antenatal women after 20 weeks of gestation without a prior history of pre-gestational diabetes mellitus were subjected to 75g oral glucose test irrespective of the time of last meal with a 2nd hour threshold of 140mg/dl. Later they were requested to undergo 100g OGTT after a week explaining the guidelines for test procedure and the results were analyzed and followed up. The mean age of study population is 23.3 ± 3.2years and 59% of GDM cases belong to age group of >25yrs. The incidence of GDM increases with parity and BMI with one or more risk factors.