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Screening for gestational diabetes in the United Kingdom: a national survey.

To determine the attitudes of British obstetricians to screening for gestational diabetes a postal questionnaire survey was undertaken. A questionnaire was sent to a single obstetrician in each of 255 obstetric hospitals identified in the United Kingdom. Of the 189 (75%) units that replied, only 42.3% had a protocol for screening for gestational diabetes. Routine antenatal screening was performed by urinalysis and blood glucose tests in 89.4% and 32.8% of units respectively. Clinical risk factors were used as an indication for routine blood glucose testing in 91.5% units. Following a positive screening test 54.5% of units performed a 75 g oral glucose tolerance test (GTT) and of these 64% relied on the World Health Organisation diagnostic criteria to interpret the result. There currently appears to be widespread variation in the practice of screening for gestational diabetes in the United Kingdom.