Table 2.

Multivariate analysis of risk factors for sepsis, corrected for clustering using random effects (n=19 752)

Risk factors	Sepsis			Severe sepsis
	aORa	CI	P valueb	aORa	CI	P valueb
Hysterectomy	1.97	1.49–2.65	<0.001	1.97	0.83–2.46	0.033
Manual placenta removal	1.30	0.92–1.83	0.139	0.90	0.46–1.74	0.750
Intrauterine tamponade	1.77	1.21–2.59	0.004	2.60	1.47–4.59	0.002
Laparotomy	6.63	4.29–10.24	<0.001	5.35	2.61–10.98	<0.001
Brace sutures	1.09	0.66–1.81	0.7369	1.36	0.62–2.99	0.454
Artery ligation	1.48	0.94–2.34	0.098	2.50	1.28–4.89	0.010
Age, y			0.891			0.652
20–25 y	1			1
25–30 y	0.93	0.67–1.27		1.36	0.72–2.56
30–40 y	1.02	0.75–1.39		1.63	0.87–3.07
>40	0.76	0.30–1.91		1.37	0.32–5.79
≤20	1.09	0.69–1.73		1.40	0.56–3.46
Cesarean delivery	1.99	1.49–2.65	<0.001	1.43	0.83–2.46	0.197
Estimated blood loss, mL			0.006			0.139
≤1000	1			1
1001–2000	1.65	1.21–2.26		1.66	0.89–3.10
>2000	1.53	0.99–2.40		2.17	0.99–4.78
Systolic blood pressure, mm Hg			<0.001			0.003
≥100	1			1
90–99	0.85	0.61–1.18		1.05	0.58–1.98
<90	1.57	1.17–2.13		2.36	1.32–4.19
Primary cause of hemorrhage			0.016			0.002
Atony	1			1
Trauma	1.40	1.05–1.88		0.93	0.52–1.66
Placenta previa/accreta	0.91	0.63–1.32		0.47	0.22–1.02
Other	1.54	1.06–2.23		2.37	1.31–4.29
Nonhospital delivery	1.34	0.96–1.88	0.088	1.12	0.62–2.03	0.713
Signs of hemodynamic instability	1.76	1.25–2.47	0.001	2.60	1.24–5.43	0.008

Abbreviations: aOR, adjusted odds ratio; CI, confidence interval.

^aLogistic regression adjusting for all variables in the table and random effects to correct for clustering by facility.

^bBased on likelihood ratio testing.