The utility of diagnostic tests in the detection and prediction of glucose intolerance in the early and late postpartum period in women after gestational diabetes: a longitudinal cohort study

Table 4 Changes in prevalence of glucose intolerance according to diagnostic test and time-period

Diagnostic test at 4–12 weeks pp (total n = 967)^a and number of GI at 4–12 weeks pp	Prevalence of GI at 4–12 weeks pp (GI)^b	Diagnostic test at 1-year pp	Prevalence of GI at 1-year pp (GI)^b	Diagnostic test at 3-year pp	Prevalence of GI at 3-year pp (still GI)^b
Glucose-intolerant participants at 4–12 weeks postpartum who remained glucose-intolerant at 1- year and 3-year postpartum
oGTT (n = 176)	18.2%	FPG & HbA1c	74.5%	FPG & HbA1c	66.7%
FPG & HbA1c (n = 266)	27.5%	FPG & HbA1c	62.2%	FPG & HbA1c	50.0%
FPG alone (n = 127) oGTT & HbA1c (n = 296)	13.2% 30.7%	FPG & HbA1c FPG & HbA1c	80.6% 60.5%	FPG & HbA1c FPG & HbA1c	75.0% 47.6%

Diagnostic test at 4–12 weeks pp (total n = 967)^a and number of NGT at 4–12 weeks pp	Prevalence of NGT at 4–12 weeks pp (normal)	Diagnostic test at 1-year pp	Prevalence of GI at 1-year pp (convert GI)	Diagnostic test at 3-year pp	Prevalence of GI at 3-year pp (convert to GI)
Glucose-tolerant participants at 4–12 weeks postpartum who convert to be glucose-intolerant at 1-year or at 3-year postpartum
oGTT (n = 791)	81.8%	FPG & HbA1c	34.3%	FPG & HbA1c	35.0%
FPG & HbA1c (n = 701)	72.5%	FPG & HbA1c	33.6%	FPG & HbA1c	34.7%
FPG alone (n = 840)	86.8%	FPG & HbA1c	35.1%	FPG & HbA1c	34.4%
oGTT & HbA1c (n = 671)	69.3%	FPG & HbA1c	33.3%	FPG & HbA1c	35.4%

^app denotes postpartum period
^bGI denotes glucose-intolerant, NGT denotes normal glucose tolerance
oGTT denotes oral glucose tolerance test
FPG denotes fasting plasma glucose, HbA1c denotes glycated hemoglobin
In brackets refers to the total number of GI or NGT at 4–12 weeks postpartum according to the diagnostic test used
In the upper part of the table, the percentages at 1-year and 3-year postpartum explain how many of initially GI participants remained GI in the postpartum period
In the lower part of the table, the percentages at 1-year and 3-year postpartum explain how many NGT participants converted to GI in the postpartum period

ISSN: 1758-5996