Table 2. Results of clinical laboratory tests and placental pathology for preterm birth cases.

Variables	Group 1	Group 2	Group 3	Group 4	P value
	Culture-positive EONS (n = 6)	Presumed EONS & Yes IAI (n = 16)	Presumed EONS & No IAI (n = 7)	No EONS & No IAI (n = 7)
Amniotic fluid
Glucose ≤15 mg/dL†LDH activity ≥419 IU/L†WBC count ≥30 cells/µL†Positive Gram stain †Positive cultures †	3 (50)4 (67)4 (67)4 (67)5 (83)	16 (100)16 (100)16 (100)13 (81)16 (100)	4 (57)2 (29)2 (29)0 (0)0 (0)	0 (0)0 (0)0 (0)0 (0)0 (0)	<0.001<0.001<0.001<0.001<0.001
Placental pathology
HCA, stages II or III †Funisitis, grades 1–4 †	6 (100)3 (50)	15 (94)11 (69)	5 (71)4 (57)	1 (14)0 (0)	<0.001<0.001
Neonatal hematology
ANC, cells/mL *ABC, cells/mL *I:T ratio, % *Platelets, cells/mLx1,000 *	489 [114–4,201]343[0–1256]10 [0–22]179 [171–267]	5,491 [2,086–8,632]2,876 [2456–4126]21 [14]–[30]232 [132–320]	2,592 [2,100–5,974]2,560 [82–4063]17 [1]–[20]209 [70–239]	3,388 [2,790–5,796]310[116–702]2 [2]–[8]217 [209–292]	0.106<0.0010.0080.615

^*Data presented as median [interquartile range] and analyzed by Kruskal-Wallis ANOVA.

^†Data presented as n (%) and analyzed by Chi square.

Abbreviations: EONS, early-onset neonatal sepsis; IAI, intra-amniotic infection; LDH, lactate dehydrogenase; WBC, white blood cell; HCA, histological chorioamnionitis; ANC, absolute neutrophil count; ABC, absolute band count; I:T ratio, ratio of immature-to-total neutrophils.