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Table 1 Association between selective and universal offer of an oral glucose tolerance test (OGTT) with gestational diabetes and severe hyperglycaemia detection rate (number tested with percentage of whole population and percentage of screened population in parenthesis)

From: Evaluation of the impact of universal testing for gestational diabetes mellitus on maternal and neonatal health outcomes: a retrospective analysis

  Selective offering of an OGTT Universal offering of an OGTT  
  2004 2005 2006 2004-2006 2008 2009 2010 2008-2010 Rate ratio comparing detection rates after to before (95% CI) for the whole population and for the screened population
Whole population 5512 5784 5864 17160 6162 6251 6101 18514  
Completed OGTT 323 (6) 299 (5) 529 (9) 1151 (7) 3797 (62) 3947 (63) 3772 (62) 11516 (62)  
GDMa identified 62 (1, 19) 83 (1, 28) 135 (2, 26) 280 (2, 24) 311 (5, 8) 398 (6, 10) 423 (7, 11) 1132 (6, 10) 3.75 (3.28 - 4.29) 0.40 (0.35 - 0.46)
Severe hyperglycaemiab identified 21 (0.4, 34) 33 (0.6, 40) 29 (0.5, 21) 83 (0.5, 30) 46 (0.7, 14) 63 (1.0, 16) 63 (1.0, 16) 172 (1.0, 15) 1.96 (1.50 - 2.58) 0.51 (0.39 - 0.67)
  1. OGTT = oral glucose tolerance test.
  2. GDM = gestational diabetes mellitus, CI = confidence interval.
  3. aGDM = either a fasting blood glucose ≥6.1 mmol/L, or a two hour blood glucose ≥7.8 mol/L or both.
  4. bSevere hyperglycaemia = either a fasting blood glucose ≥7 mmol/L, or a two hour blood glucose ≥11.1 mmol/L or both.