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. 2019 Dec 15;30(1):010704. doi: 10.11613/BM.2020.010704

Table 3. Information about diagnostic tests.

Question 1: Where do you perform OGTT?
At the laboratory 68
At peripheral facilities 9
GDM Screening at peripheral facilities, OGTT at the laboratory 19
Other 4
Question 2: Treatment of OGTT samples:
Centrifugation after each collection, analysis 75
RT, centrifugation after last collection, analysis 20
Refrigerated, centrifugation after the last collection, analysis 5
Other 0
Question 3: What reference values do you use for routine fasting glucose test in adults?
3.9 - 6.05 mmol/L, WHO; 1999 50
3.9 - 5.6 mmol/L, ADA; 2003 34
Other 16
Question 4: What cut-off value do you use in OGTT to diagnose DM in adults?
Fast 8h/OGTT 75g/Glucose 2h 11.1 mmol/L 100
Other 0
Question 5: What cut-off value do you use in OGTT for impaired glucose tolerance?
Fast 8h/OGTT 75g/Glucose 2h 11.1 mmol/L 98
Other 2
Question 6: What cut-offs value do you use to diagnose GDM?
ONE STEP: 24-28 week, fast 8h/OGTT 75g/ Basal 7.0 mmol/L; 2h 7.8 mmol/L, WHO; 1999 12
ONE STEP: 24-28 week, fast 8h/ OGTT 75g/ Basal 5.1 mmol/L; 1h 10.0 mmol/L; 2h 8.5 mmol/L, IADPSG; 2010, ADA; 2016 10
TWO STEPS: 24-28 week. STEP 1: O’Sullivan test OGO 50g/ 1h glucose 7.8 mmol/L; STEP 2: Fast 8h/OGTT 100g/ Basal 5.8 mmol/L; 1h 10.6 mmol/L; 2h 9.2 mmol/L; 3h 8.0 mmol/L, NDDG; 1979, ADA; 2016, GEDE; 2006 56
TWO STEPS: STEP 1: O’Sullivan OGO 50g/ 1h 7.8 mmol/L; STEP 2: fast 8h/OGTT 100 g/ Basal 5.3 mmol/L; 1h 10.0 mmol/L; 2h 8.6 mmol/L; 3h 7.8 mmol/L, Carpenter/Coustan; 1982, ADA; 2016 12
Other* 10
Results are presented as percentage. *Laboratories using two criteria of the previous ones: 4%. Only O’Sullivan test 6%. WHO - World Health Organization. ADA - American Diabetes Association. OGTT - Oral Glucose Tolerance Test. NDDG - National Diabetes Data Group. GEDE - Spanish Group of Diabetes and Pregnancy. OGO - Oral glucose overload. IADPSG - International Association of Diabetes and Pregnancy Study Group.