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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