Oral versus intravenous glucose tolerance tests during pregnancy: Report on 200 cases evaluated by both tests

Abstract

1.1. Oral and intravenous glucose tolerance tests were performed during the same week in the third trimester of pregnancy in each of 200 selected patients.2.2. In 58.5 per cent of the 200 subjects studied the results of the two tests were in agreement, both being normal in 28 per cent and abnormal in 30.5 per cent. In 41.5 per cent, there was a discrepancy between the two tests. In 39.5 per cent the oral alone was abnormal and in only 2 per cent was the intravenous test the only indication of impaired glucose tolerance.3.3. Fifty-six per cent of the patients revealing abnormal glucose tolerance by the oral test were shown to have normal tolerance when tested intravenously.4.4. The possible significance and implications of these findings are discussed.