Figure 4From: Poor glycated haemoglobin control and adverse pregnancy outcomes in type 1 and type 2 diabetes mellitus: Systematic review of observational studies Risk of major congenital malformation for poor versus optimal glycaemic control. Pooled odds ratio = 5.14 (95% CI = 3.00 to 9.01). Chi2 (test odds ratio differs from 1) = 32.8 (df = 1) P < 0.001.Back to article page