Table 3.

Outcomes related to admission hemorrhage risk score and associated risk ratio (95% CI)

Outcome	Hemorrhage risk score			p-Value	Risk ratio (95% CI)
	Low (n = 14,885)	Medium (n = 26,326)	High (n = 15,974)		Medium vs. Low	High vs. Low
Any blood transfusion	26 (0.2%)	119 (0.5%)	136 (0.9%)	<0.0001	2.6 (1.7–4.0)	4.9 (3.2–7.4)
EBL ≥1,000 mL	294 (2.0%)	1,795 (6.8%)	1,631 (10.2%)	<0.0001	3.5 (3.1–3.9)	5.2 (4.6–5.8)
ICU admissiona	13 (0.1%)	43 (0.2%)	33 (0.2%)	0.024	1.9 (1.0–3.5)	2.4 (1.2–4.5)
General anesthesia	59 (0.4%)	249 (1.0%)	236 (1.5%)	<0.0001	2.4 (1.8–3.2)	3.7 (2.8–5.0)
Chorioamnionitis	114 (0.8%)	188 (0.7%)	345 (2.2%)	<0.0001	0.93 (0.75–1.18)	2.8 (2.3–3.5)

Abbreviations: CI, confidence interval; EBL, estimated blood loss; ICU, intensive care unit.

^aIncludes all ICU admissions.