Table 2.

Unadjusted and adjusted models for the morbidity composite among women undergoing peripartum hysterectomy with atony or secondary postpartum hemorrhage

	Unadjusted risk ratio (95%CI)	Adjusted risk ratio (95%CI)
Procedure
Interventional radiology	1.85 (1.61, 2.12)**	1.75 (1.51, 2.03)**
Uterine tamponade	1.70 (1.54, 1.88)**	1.63 (1.47, 1.81)**
None	Referent	Referent
Year
2006	Referent	Referent
2007	1.08 (0.80, 1.44)	1.07 (0.80, 1.42)
2008	1.34 (1.03, 1.73)*	1.27 (1.00, 1.63)
2009	1.36 (1.02, 1.81)*	1.27 (0.96, 1.68)
2010	1.16 (0.85, 1.59)	1.08 (0.80, 1.46)
2011	1.36 (1.05, 1.75)*	1.29 (1.01, 1.65)*
2012	1.50 (1.15, 1.95)*	1.36 (1.06, 1.76)*
2013	1.34 (1.03, 1.75)*	1.20 (0.93, 1.56)
2014	1.62 (1.26, 2.08)*	1.43 (1.12, 1.82)*
Age in yearstam
15–34	Referent	Referent
35–39	1.06 (0.91, 1.23)	1.02 (0.86, 1.19)
40–54	1.11 (0.95, 1.31)	1.06 (0.89, 1.26)
Marital Status
Married	Referent	Referent
Single	1.04 (0.93, 1.15)	0.99 (0.87, 1.12)
Other/Unknown	1.14 (0.99, 1.31)	1.06 (0.93, 1.21)
Race
White	Referent	Referent
Black	1.15 (0.98, 1.34)	1.17 (1.01, 1.37)*
Other/Unknown	1.17 (1.05, 1.30)*	1.14 (1.02, 1.27)*
Payer
Medicaid	1.01 (0.92, 1.12)	1.00 (0.90, 1.11)
Commercial	Referent	Referent
Uninsured/unknown	1.06 (0.87, 1.30)	1.04 (0.86, 1.26)
Rurality
Urban	1.33 (1.04, 1.70)*	1.30 (1.03, 1.64)*
Rural	Referent	Referent
Teaching hospital
No	Referent	Referent
Yes	0.99 (0.88, 1.12)	0.89 (0.77, 1.03)
Hospital bed volume
<400	Referent	Referent
400–600	1.13 (0.99, 1.28)	1.13 (0.99, 1.30)
>600	1.03 (0.86, 1.24)	1.04 (0.85, 1.26)
Hospital region
Northeastern	Referent	Referent
Midwest	1.04 (0.88, 1.24)	1.07 (0.89, 1.28)
South	0.96 (0.81, 1.13)	0.99 (0.85, 1.16)
West	1.10 (0.92, 1.30)	1.05 (0.87, 1.27)
Preeclampsia
No	Referent	Referent
Yes	1.23 (1.06, 1.41)*	1.21 (1.05, 1.40)*

CI, confidence interval.

^*P<0.05

^**p<0.01.

All variables in the table were included in the adjusted analyses.