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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