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. Author manuscript; available in PMC: 2016 Jul 21.
Published in final edited form as: J Perinatol. 2016 Jan 21;36(5):342–346. doi: 10.1038/jp.2015.215

Table 3.

Positive Predictive Values for 283 participants with 1 hour GCT ≥160 mg/dL using 1 hour GCT values, maternal BMI, age over 30, and history of GDM.

1 hour GCT Value Positive Predictive Value National Diabetes Data Group Criteria for GDM
(95% Confidence Interval)		 Positive Predictive Value Carpenter – Coustan Criteria for GDM
(95% Confidence Interval)
≥160, n=283 38.2%
(32.5, 44.1)		 51.6%
(45.6, 57.5)
≥160, and history of GDM, n=115 71.3%
(62.1, 79.4)		 89.6%
(82.5, 94.5)
≥160, and history of GDM, age≥30, BMI≥30 kg/m2, n=40 80.0%
(64.4, 90.9)		 92.5%
(79.6, 98.4)
≥180, n=96 52.1%
(41.6, 62.4)		 64.6%
(54.2, 74.1)
≥180, and history of GDM, n=53 75.5%
(61.7, 86.2)		 90.6%
(79.3, 96.9)
≥180, and history of GDM, age≥30, BMI≥30 kg/m2, n=23 82.6%
(61.2, 95.0)		 91.3%
(72.0, 98.9)
≥200, n=35 68.6%
(50.7,83.1)		 80.0%
(63.1, 91.6)
≥200, and history of GDM, n=23 87.0%
(66.4, 97.2)		 95.7%
(78.1, 99.9)
≥200, and history of GDM, age≥30, BMI≥30 kg/m2, n=13 84.6%
(54.6, 98.1)		 92.3%
(64.0, 99.8)
≥220, n=11 72.7%
(39.0, 94.0)		 81.8%
(48.2, 97.7)
≥220, and history of GDM, n=7 100.0%
(59.0, 100.0)		 100.0%
(59.0, 100.0)
≥220, and history of GDM, age≥30, BMI≥30 kg/m2, n=4 100.0%
(39.8, 100.0)		 100.0%
(39.8, 100.0)