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Table 4 Relative risk estimates per 1-percentage point increase in glycated haemoglobin and the outcome of congenital malformation.

From: Poor glycated haemoglobin control and adverse pregnancy outcomes in type 1 and type 2 diabetes mellitus: Systematic review of observational studies

Author Mean SD 25th percentile 75th percentile Difference between 25th and 75th percentile Inverse Relative Risk Relative Risk per 1% point increase Relative Risk per 1% point decrease
Miller [18] 8.54 1.54 7.50 9.58 2.08 1.87 2.34 0.59
Greene [23] 10.10 1.99 8.76 11.44 2.68 1.31 1.63 0.39
Evers [16] 6.5 0.70 6.03 6.97 0.94 0.65 1.99 0.50
Key [19] 10.99 1.10 10.25 11.73 1.48 1.0 1.95 0.49