which require the
presence of two or more of the following values in the 100-g GTT:
fasting serum glucose concentration exceeding 5.3 mmol/L, 1-hour
serumglucose concentration of 10mmol/L or higher, 2-hour serumglucose
concentration exceeding 8.6 mmol/L, and 3-hour serum glucose
concentration exceeding 7.8 mmol/L. The diagnosis of overt diabetes
in the postpartum period was based on the results of a 75-g GTT,
which was performed 6–12 weeks after delivery.Overt diabetes was defined
as having a fasting plasma glucose level of 7mmol/L or higher, or a
2-hour plasma glucose level of 11.1 mmol/L or higher, as previously
used [11]. Blood glucose concentrations were analyzed enzymatically
using a Hitachi 760–210 autoanalyzer