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. 2021 Sep 30;11:19449. doi: 10.1038/s41598-021-98951-4

Table 1.

Characteristics of the study participants.

Vaginal
N = 23
C-section
N = 21a
All
N = 44
Mothers age, year mean (SD) 28.3 (5.0) 35.8 (5.0) 31.9 (6.3)
Gestational age (weeks) mean (SD) 39.5 (2.3) 39.3 (0.9) 39.4 (1.8)
Birth weight (grams) mean (SD) 3510 (280) 3740 (620) 3620 (480)
Boys (%) 12 (52%) 10 (48%) 22 (50%)
Maternal asthma 0 4 (19%) 4 (9.1%)
Maternal allergy 8 (35%) 11 (52%) 19 (43%)
Gestational diabetes 4 (17%) 8 (38%) 12 (27%)
Streptococcus agalactiaeb 5 (22%) 9 (43%)b 14 (32%)
Antibiotics during pregnancy 9 (39%) 5 (24%) 14 (32%)*
Intrapartum antibiotics 5 (22%) 21 (100%) 26 (59%)**
Perinatal antibiotics after birth 1 (4.3%) 1 (4.8%) 2 (4.5%)
NICU admission 1 (4.3%) 2 (9.5%) 3 (7.0%)

NICU neonatal intensive care unit.

a2 patients recruited in the vaginal delivery group gave birth via C-section and were analyzed as such.

bStreptococcus agalactiae screening before birth was not performed in 6 cases.

*In the vaginal delivery group, 1 mother had been administered amoxicillin. In the C-section group 1 mother had been administered amoxicillin and 1 received cephalexin.

**In the vaginal delivery group, all 5 mothers had been administered benzylpenicillin. In the C-section group, 19 mothers had been administered cefuroxime, 1 Piperacillin-Tazobactam, and 1 received Clindamycin.