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Table 4 Prevalence of GDM by season. Prevalence of GDM with 1-h and 2-h post-OGTT VPG values excludes those with an abnormal fasting value

From: Seasonality, temperature and pregnancy oral glucose tolerance test results in Australia

 

Summer (%) n = 476

Autumn (%) n = 530

Winter (%) n = 558

Spring (%) n = 558

p value

GDM prevalence by fasting plasma glucose ≥5.1 mmol/L n = 79

5.5%

6.4%

9.5%

8.4%

= 0.055

GDM prevalence by 1-h post-load glucose ≥10.0 mmol/L n = 31

6.5%

3.6%

2.5%

3.2%

= 0.009

GDM prevalence by 2-h post-load glucose ≥8.5 mmol/L n = 12

4.2%

3.2%

1.6%

4.7%

= 0.033

Overall GDM prevalence by WHO criteria

n = 122

13.9%

12.1%

12.9%

15.1%

= 0.510

  1. Data represented as %