TABLE 5.

Crude and Adjusted PRs for Associations Between Demographic and Clinical Factors and Delayed CCHD Diagnosis

	Crude PR for Delayed Diagnosis (95% CI)	aPR a for Delayed Diagnosis (95% CI)
Maternal age, y
15–24	Reference	Reference
25–34	1.1 (0.7–1.7)	1.2 (0.8–1.9)
≥35	0.9 (0.5–1.4)	1.0 (0.6–1.7)
Maternal race/ethnicity
Non-Hispanic white	Reference	Reference
Non-Hispanic black	0.9 (0.5–1.6)	1.2 (0.6–2.4)
Hispanic	0.8 (0.4–1.3)	0.9 (0.6–1.5)
Asian	1.2 (0.6–2.2)	1.3 (0.7–2.5)
Other	1.0 (0.4–2.6)	1.0 (0.5–2.0)
Maternal education, y
≥12	Reference	Reference
0–11	1.0 (0.6–1.7)	0.8 (0.4–1.5)
Region of residence
Boston	Reference	Reference
Outside Boston	2.4 (1.2–5.0) b	1.6 (0.7–3.7)
Delivery hospital type
Level 3	Reference	Reference
Level 1, level 2, home or birth center	4.1 (2.9–5.7) b	3.6 (2.5–5.2) b
Prenatal care insurance type
Private	Reference	Reference
Government/other	1.1 (0.8–1.6)	1.2 (0.8–1.8)
Prenatal care initiation
First trimester	Reference	Reference
After first trimester	1.8 (1.2–2.6) b	1.4 (0.9–2.1)
CCHD type
Nonisolated	Reference	Reference
Isolated c	1.9 (1.2–3.0) b	1.7 (1.1–2.7) b
Gestational age, wk d
≥37	Reference	Reference
20–36	0.5 (0.3–0.9) b	0.7 (0.4–1.2)
Plurality
Singleton	Reference	Reference
Multiple	0.9 (0.5–1.7)	1.4 (0.8–2.6)
Birth weight, g
≥1500	Reference	Reference
355–1499	0.3 (0.1–1.3)	0.6 (0.2–2.5)

^aAdjusted model includes all demographic and clinical factors examined. Each individual variable is presented after controlling for all other variables in the model.

^b P < .05.

^cIncludes cases with single CCHDs and cases with multiple cardiac defects.

^dBased on clinical estimate.