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Table 1 Basic characteristics of the study population stratified for benzylpenicillin and other antibiotics

From: Benzylpenicillin concentrations in umbilical cord blood and plasma of premature neonates following intrapartum doses for group B streptococcal prophylaxis

Intrapartum antibiotic type

Benzylpenicillin

Other antibiotics a

Number of infants

19

27

Female infants n (%)

10 (52.6)

15 (55.6)

Maternal age in years (median (IQR))

30.2 (28.0—33.0)

32.5 (29.0—35.0)

Mode of delivery (n)

 Vaginal n(%)

18 (94.7)

9 (33.3)

 Caesarian n(%)

1 (5.3)

18 (66.7)

 PROM duration in hours (median (IQR))

3.5 (0—47.3)

12.5 (0—74.8)

Maternal GBS colonization

 Positive n (%)

6 (31.6)

4 (14.8)

 Negative n (%)

13 (68.4)

10 (37.0)

 Unknown n (%)

-

13 (48.2)

 Multiparous pregnancies n (%)

4 (21.1)

3 (11.1)

 Gestational age in weeks (median (IQR))

29.3 (27.1—30.8)

31.0 (28.2—36.0)

 Birth weight in kg (median (IQR)

1.15 (0.93—1.67)

1.52 (1.19—2.56)

 Umbilical cord blood samples (n)

19

27

 Neonatal plasma samples (n)

9

9

  1. PROM Premature Rupture Of Membranes, GBS Group B streptococcus; aOther antibiotics are: amoxicillin (n = 14), gentamicin (n = 3) and cefazolin (n = 13)