Table 2.

Clinical characteristics according to Chlamydia trachomatis status by strata of pre-eclampsia

	C. trachomatis negative	C. trachomatis positive	OR (95% CI)
No pre-eclampsia	n = 132 (69)	n = 59 (31)
Antenatal characteristics
Maternal age	30.8 ± 5.1	30.1 ± 4.8	NA
Para	1.9 ± 1.3	1.9 ± 1.1	NA
Gravida	2.3 ± 1.7	2.0 ± 1.2	NA
Clinical characteristics
≥2 clinical signs CA	47 (36)	24 (41)	1.2 (0.7–2.3)
Fetal distress	41 (31)	16 (27)	0.8 (0.4–1.6)
PROM	60 (45)	24 (41)	0.8 (0.4–1.5)
Delivery characteristics
Caesarean section	59 (45)	20 (34)	0.6 (0.3–1.2)
Gestational age	28.8 ± 2.0	29.1 ± 2.0	NA
Birth weight (gram)	1,194 ± 354	1,223 ± 359	NA
SGA	18 (14)	9 (15)	1.1 (0.5–2.7)

Pre-eclampsia	n = 96 (85)	n = 17 (15)
Antenatal characteristics
Maternal age	31.1 ± 5.6	30.0 ± 5.7	NA
Para	1.7 ± 1.2	1.8 ± 1.1	NA
Gravida	2.0 ± 1.7	1.9 ± 1.2	NA
Clinical characteristics
≥2 clinical signs CA	1 (1)	0 (0)	NA
Fetal distress	73 (76)	11 (65)	0.6 (0.2–1.7)
PROM	3 (3)	1 (6)	1.9 (0.2–19.8)
Delivery characteristics
Caesarean section	87 (91)	13 (77)	0.3 (0.1–1.3)
Gestational age	29.5 ± 1.7	29.1 ± 1.8
Birth weight (gram)	1,027 ± 314	1,151 ± 321
SGA*	49 (51)	3 (18)	0.2 (0.06–0.7)

Numbers are mean ± SD or number (%), n number, OR odds ratio, CI confidence interval, NA not applicable, CA chorioamnionitis, PROM premature rupture of membranes, SGA small for gestational age. Analysis with Pearson’s Chi-square test or Fisher’s Exact test; * P = 0.02