Table D.7Calculating PPV and NPV using ADA criteria as a risk factor screen

ParameterValue
n18 504
Prevalence = 564/18 5043.05%
High risk = 0.9 × 18 50416 654
Gestational diabetes cases in high risk = 564 − 17547
PPV = 547/16 6543.28%
Low risk = 0.1 × 18 5041,850
Gestational diabetes cases in low risk17
NPV = 1833/185099.1%

From: Appendix D, Cost-effectiveness of screening, diagnosis and treatment for gestational diabetes

Cover of Diabetes in Pregnancy
Diabetes in Pregnancy: Management of Diabetes and Its Complications from Preconception to the Postnatal Period.
NICE Clinical Guidelines, No. 63.
National Collaborating Centre for Women's and Children's Health (UK).
London: RCOG Press; 2008 Mar.
Copyright © 2008, National Collaborating Centre for Women’s and Children’s Health.

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