Figure 5From: Poor glycated haemoglobin control and adverse pregnancy outcomes in type 1 and type 2 diabetes mellitus: Systematic review of observational studies Risk of miscarriage for poor versus optimal glycaemic control. Pooled odds ratio = 3.23 (95% CI = 1.64 to 6.36). Chi2 (test odds ratio differs from 1) = 11.48 (df = 1) P = 0.001.Back to article page