Table 2. Clinical characteristics of non-sepsis obstetric population compared to women with uncomplicated sepsis, compared to severe sepsis, compared to septic shock in California (2005–2007).

	Obstetric population without sepsis	P-value*	Uncomplicated sepsis	P-value*	Severe sepsis	P-value*	Septic shock
	n = 1620876		n = 807		n = 735		n = 56
Prenatal care		0.13		0.593		0.292
Adequate	1299448 (80.2)		630 (78.1)		582 (79.2)		41 (73.2)
Inadequate	321428 (19.8)		177 (21.9)		153 (20.8)		15 (26.8)
Parity		0.216		<0.0001		0.575
Primiparous	625377 (38.6)		293 (36.5)		349 (47.6)		24 (43.6)
Multiparous	994185 (61.4)		510 (63.5)		385 (52.4)		31 (56.4)
Multiple pregnancy		0.626		<0.0001		0.66
Singleton	1571423 (96.9)		780 (96.7)		657 (89.4)		49 (87.5)
Multiple	49453 (3.1)		27 (3.4)		78 (10.6)		7 (12.5)
Chronic Co-Morbidities
Diabetes	113014 (7.0)	0.014	74 (9.2)	<0.0001	112 (15.2)	0.381	11 (19.6)
Chronic hypertension	15850 (1.0)	0.266	11 (1.4)	<0.0001	37 (5.0)	1.00	2 (3.6)
Mode of delivery		<0.0001		0.001		0.006
Spontaneous vaginal	1037472 (64.0)		425 (52.7)		314 (42.7)		17 (30.4)
Primary caesarean	292114 (18.0)		232 (28.8)		272 (37.0)		34 (60.7)
Repeat caesarean	216915 (13.4)		120 (14.9)		123 (16.7)		4 (7.1)
Operative vaginal**	74375 (4.6)		30 (3.7)		26 (3.5)		1 (1.8)
BMI (2007 only)	n = 481994		n = 250		n = 211		n = 17
Median (IQR)	24.3 (21.5–28.3)	0.642***	24.5 (21.8–28.7)	0.298***	25.6 (22.1–29.3)	0.379***	24.2 (19.4–29.2)

Figures are numbers (%) of women.

^*Difference in distribution between groups; χ2 test; Fisher's exact test for <5 observations.

^**Forceps or vacuum extraction.

^***Wilcoxon rank-sum (Mann-Whitney) test.