There is a high rate of false positives on the 1 - hour glucose challenge test. (wellnessmama.com)
A study found sensitivity and specificity of the 1 - hour glucose challenge test were 27 % and 89 %, respectively, with a prevalence rate of 5 %. (wellnessmama.com)
Among pregnancies for which screening occurred at Mount Sinai Hospital (n = 44 110), 859 (1.9 %) fulfilled the diagnostic criterion of a very high 1 - hour glucose concentration of 10.3 mmol / L or more for the 50 - g glucose challenge test. (cmaj.ca)