['In Germany, urine analysis with dip sticks are used for screening of gestational diabetes. Our goal was to find the cut-off levels of glucose dip sticks and evaluate the influence of ascorbic acid on the result.', 'We took urine samples of 152 pregnant patients between 01/2004 and 10/2004. The glucose content of the urine was analyzed using several dip sticks (Combur10 Roche, Multistix 8SG Bayer, Diabur5000 Roche and by the hexokinase method. The ascorbic acid concentration of the specimen was determined.', 'Glycosuria test dip sticks have a good sensitivity and specificity of the expected positive/negative-reaction compared with the hexokinase method but showed a significant reduction of the color reaction at high concentrations of ascorbic acid.'] Does accuracy and influence of ascorbic acid on glucose-test with urine dip stick in prenatal care?