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Table 1 Infant characteristics

From: Early-life skin microbiota in hospitalized preterm and full-term infants

  Preterm (N = 40) Term (N = 89)
Baseline characteristics
 Birth weight (g), median (range) 845 (540–2508) 3365 (1820–4440)
 Gestational age (weeks), median (range) 27 (23–36) 39 (37–42)
 Female sex, n (%) 28 (70) 46 (52)
 Multiple gestation, n (%) 13 (33) 7 (8)
 Race, n (%)
  White 19 (48) 45 (51)
  Black or African American 20 (50) 28 (31)
  Asian 0 (0) 2 (2)
  Native Hawaiian or other Pacific Islander 0 (0) 1 (1)
  Unknown or not reported 1 (3) 13 (15)
 Hispanic or Latino, n (%) 0 (0) 5 (6)
 Mother hospital days prior to delivery, median (range) 3.5 (0–15) 0 (0–6)
 Labor prior to delivery, n (%) 21 (53) 62 (70)
 Prolonged rupture of membranes > 18 h, n (%) 6 (17) 14 (17)
 Cesarean section, n (%) 30 (86) 36 (43)
Clinical factors at time of sampling
 Age at sampling (d), median (range) 42 (1–252) 1 (0–122)
 Location, n (%)
  Neonatal intensive care unit 40 (100) 12 (13)
  Mother’s room 0 (0) 77 (87)
 Type of bed at time of sampling, n (%)
  Open crib 18 (45) 87 (98)
  Warmer bed 1 (3) 2 (2)
  Isolette 21 (53) 0 (0)
 Diet, n (%)
  Mostly breast milk 19 (48) 56 (63)
  Mostly formula 15 (38) 33 (37)
  Any receipt of breast milk 32 (80) 63 (71)
  No feeds prior to sampling 6 (15) 0 (0)
 Primary feeding route, n (%)
  Breastfeeding 1 (3) 50 (56)
  Bottle 7 (18) 38 (43)
  Feeding tube 26 (65) 1 (1)
  No feeds prior to sampling 6 (15) 0 (0)
 Previous antibiotic exposure, n (%) 37 (93) 15 (17)