Table 3 Bivariable logistic regression analysis of risk factors and outcomes associated with cases of S marcescens bacteremia versus E Coli‐bacteremic controls.

Characteristic	S marcescens (n = 25)	E Coli (n = 50)	OR (95% CI)*	p†
Host and perinatal factors
Vaginal delivery	10 (40)	14 (28)	1.40 (0.82 to 2.40)	0.19
Maternal antibiotic use	9 (36)	27 (54)	0.48 (0.18 to 1.29)	0.14
Preterm labor	16 (64)	36 (72)	0.69 (0.25 to 1.92)	0.48
Prolonged rupture of membranes	2 (8)	13 (26)	0.25 (0.05 to 1.20)	0.06
Maternal fever	1 (4)	7 (14)	0.26 (0.03 to 2.21)	0.21
Chorioamnionitis	3 (12)	10 (20)	0.55 (0.14 to 2.19)	0.39
Procedures and conditions
Intubated	13 (52)	21 (42)	1.50 (0.57 to 3.93)	0.41
Prolonged intubation	11 (44)	6 (12)	5.76 (1.80 to 18.42)	<0.01
Surgery	12 (48)	13 (26)	2.63 (0.96 to 7.20)	0.06
Urinary catheter	1 (4)	1 (2)	2.04 (0.12 to 34.07)	0.61
CVC	20 (80)	17 (34)	7.77 (2.48 to 24.31)	<0.001
TPN	14 (56)	14 (28)	3.27 (1.20 to 8.92)	0.02
Intralipids	13 (52)	13 (26)	3.08 (1.13 to 8.44)	0.03
H2‐blockers	11 (44)	10 (20)	3.14 (1.10 to 8.99)	0.03
Repeat positive blood culture	13 (52)	12 (24)	3.43 (1.24 to 9.50)	0.02
Presenting signs and symptoms
Apnea	9 (36)	23 (46)	0.66 (0.25 to 1.77)	0.41
Bradycardia	7 (28)	16 (32)	0.83 (0.29 to 2.38)	0.72
Hypoglycemia	3 (12)	5 (10)	1.23 (0.27 to 5.61)	0.79
Hyperglycemia	8 (32)	18 (36)	0.84 (0.30 to 2.32)	0.73
Hypothermia	11 (44)	17 (34)	1.53 (0.57 to 4.08)	0.40
Hyperthermia	8 (32)	7 (14)	2.89 (0.91 to 9.22)	0.07
Neutropenia	1 (4)	6 (12)	0.31 (0.04 to 2.69)	0.29
Clinical outcome
Meningitis	6 (24)	8 (16)	1.66 (0.51 to 5.45)	0.41
Death	11(44)	14(28)	2.02 (0.74 to 5.51)	0.17
Sepsis‐related death	6 (24)	11 (22)	1.12 (0.36 to 3.49)	0.85

†Bivariable logistic regression

*OR: odds ratio; CI: confidence interval