Table 3.

Risk of IUGR by Previa Type and Resolution

	IUGR (%)	AOR* (95% CI)	p	Resolved Previa (%)	Persistent Previa (%)	IUGR in Persistent Previa (%)	AOR† (95% CI)	p
Any Previa (n = 1665) (Second Scan Available 1002)	103 (6.5%)	1.0 (0.8–1.2)	0.33	837 (83.5%)	165 (16.5%)	21 (13.9%)	1.4‡ (0.8–2.3)	0.23
Complete Previa (n = 392) (Second Scan Available 229)	32 (8.7%)	1.4 (0.9 – 2.0)	0.23	135 (59.0%)	94 (41.0%)	15 (20.2%)	1.6‡ (0.7–3.5)	0.23
Partial Previa (n = 332) (Second Scan Available 208)	19 (5.9%)	0.9 (0.6 – 1.4)	0.43	168 (80.8%)	40 (19.2%)	0	-	0.23
Marginal Previa (n = 941) (Second Scan Available 565)	52 (5.8%)	0.8 (0.6 – 1.1)	0.11	534 (94.5%)	31 (5.5%)	1 (4.3%)	0.5§ (0.1–4.2)	0.56

^*Reference Group: Patients with no previa, n=57015, rate of IUGR 7.2% (see Table 2). Adjusted for black race, diabetes, preeclampsia, and single umbilical artery.

^†Reference Group: Patients with resolved previa.

^‡Adjusted for single umbilical artery

^§Adjusted for preeclampsia