Table 2.

Characteristics of PHDS reporting compar ed with the true occurrence of disease as abstracted from the medical record.

	Reporting characteristics by PHDS source % (95% confidence interval)*
	Birth data				Hospital data				Either birth or hospital data
Hypertension type	Sensitivity	Specificity	PPV	κ	Sensitivity	Specificity	PPV	κ	Sensitivity	Specificity	PPV	κ
Chronic hypertension	22.6 (5.7–50.7)	99.8 (99.3–100)	56.3 (15.7–91.2)	0.32	44.4 (19.7–71.3)	100 (99.7–100)	100 (57.9–100)	0.61	46.9 (21.6–73.4)	99.8 (99.3–100)	72.7 (36.9–94.7)	0.57
Gestational hypertension	—	—	—	—	47.8 (36.0–59.8)	99.2 (98.4–99.6)	78.9 (64.1–89.7)	0.58	—	—	—	—
Preeclampsia	84.7 (64.8–95.8)	96.0 (94.7–97.1)	31.6 (20.8–44.0)	0.44	71.0 (49.7–87.1)	99.2 (98.5–99.6)	66.7 (46.0–83.5)	0.68	99.1 (84.8–100)	95.8 (94.4–96.9)	33.8 (23.2–45.7)	0.49
Any Pregnancy hypertension	63.3 (53.0–72.8)	99.5 (98.9–99.8)	92.4 (83.3–97.4)	0.73	68.2 (58.1–77.2)	99.6 (99.1–99.9)	94.4 (86.2–98.4)	0.78	82.3(73.3–89.3)	99.3(98.7–99.7)	91.9(84.1–96.6)	0.86
Age <35 years	67.7 (56.3–77.7)	99.4 (98.7–99.8)	91.5 (81.3–97.1)	0.76	74.7 (63.7–83.7)	99.6 (98.9–99.9)	93.9 (84.9–98.4)	0.82	88.8 (79.8–94.8)	99.2 (98.4–99.7)	91.1 (82.4–96.3)	0.89
Age ≥35 years	44.6 (21.9–69.1)	100 (98.1–100)	99.1 (62.9–100)	0.59	40.2 (18.5–65.1)	99.9 (98.0–100)	98.3 (58.9–100)	0.55	54.0 (29.7–77.0)	99.9 (97.9–100)	98.0 (66.5–100)	0.68
Primiparous	72.9 (57.5–85.1)	100 (99.1–100)	99.8 (89.0–100)	0.83	80.1 (65.5–90.5)	100 (99.1–100)	99.8 (89.8–100)	0.88	92.6 (80.7–98.3)	100 (99.1–100)	99.7 (90.9–100)	0.96
Multiparous	55.4 (41.3–69.0)	99.2 (98.2–99.7)	85.5 (69.4–95.0)	0.65	58.3 (44.1–71.6)	99.4 (98.5–99.8)	88.9 (73.8–96.9)	0.69	73.8 (60.0–84.8)	98.9 (97.8–99.6)	84.9 (71.5–93.7)	0.77
Any hypertension	65.0 (55.4–73.7)	100 (99.6–100)	99.8 (94.7–100)	0.77	73.8 (64.7–81.7)	99.8 (99.3–100)	97.6 (91.7–99.7)	0.83	81.4 (73.0–88.1)	99.8 (99.3–100)	97.7 (92.2–99.7)	0.88

^*% are weighted for the sampling probability.

PPV = Positive Predictive Value

κ = Kappa statistic