. Author manuscript; available in PMC: 2015 Jun 1.

Published in final edited form as: Pharmacoepidemiol Drug Saf. 2014 Apr 16;23(6):646–655. doi: 10.1002/pds.3627

Table 5.

Proportions of Pregnancies Confirmed to Have Obstetric Factors Among Potential Preeclampsia Cases With Available Records.

Identification Criteria	Number of Records Reviewed	Number Confirmed	Positive Predictive Value (95% Confidence Interval)
Multiparity	129	112	86.6 (79.9, 91.6)
Induction	58	56	96.6 (88.3, 99.1)
Cesarean Delivery	75	74	98.7 (92.8, 99.8)
Preterm Delivery^*	47	35	74.5 (60.5, 84.8)

The PPV for preterm delivery among potential PPHN cases with available records was 48.7% (95% CI: 33.9, 63.8), and it was 73.6% (95% CI: 62.4–82.4) among potential cardiac malformation cases.