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Table 2 Odds ratio, 95 % confidence interval and p-value for predictors for GDM-WHO at week 32–36, GDM-WHO diagnosed at week 18–22 or 32–36, GDM-IADPSG at week 18–22, GDM-IADPSG at week 32–36 and GDM-IADPSG diagnosed at week 18–22 or 32–36

From: Hemoglobin A1c as screening for gestational diabetes mellitus in Nordic Caucasian women

Predictor

GDM-WHO week 32–36

GDM-WHO throughout pregnancy

GDM-IADPSG week 18–22a

GDM-IADPSG week 32–36a

GDM-IADPSG throughout pregnancya

OR

95 % CI

p-value

OR

95 % CI

p-value

OR

95 % CI

p-value

OR

95 % CI

p-value

OR

95 % CI

p-value

HbA1c week 18–22

   

10.1

2.1–49

0.004

11.4

1.10–119

0.04

   

21

4.6–99

<0.0005

HbA1c week 32–36

49

11–215

<0.0005

      

56

11–291

<0.0005

   

Age

1.08

1.00–1.17

0.05

1.08

1.00–1.16

0.06

         

Family history of diabetes

   

2.31

1.00–5.3

0.05

         

BMI

      

1.13

0.98–1.30

0.09

1.12

0.99–1.26

0.06

1.15

1.05–1.26

0.002

  1. The ORs are for one percentage point increase in HbA1c, one year increase in age and a unit (kg/m2) increase in BMI
  2. aModified IADPSG criteria were used, i.e. 1-h s-glucose was missing