cluded from the study because of high glucose values
were considered (21). This recommendation has been
controversial, and arguments for and against can be
found in a previous issue of this journal (22, 23). Such
a high prevalence of GDM has major implications
for healthcare delivery. However, the recommended
thresholds for GDM are not dissimilar to the current
generally accepted diagnostic criteria for prediabetes
(Table 3) in nonpregnant individuals. In view of the
current 11.3% prevalence of diabetes in the US adult
population(24) and the 35% prevalence of prediabetes
(25), the proposed increase in prevalence of GDM does
not seem unreasonable. The ADA has endorsed the
IADPSG recommendations (1) for diagnosing gesta