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Table 1 Means (95% Confidence Interval) of the Demographic Data and Clinical Characteristics of Preterm Infants Participating this Study

From: Serratia marcescens colonization in preterm neonates during their neonatal intensive care unit stay

Characteristics Mean (95% CI) or n (%)
Colonizated by Serratia marcescens Not colonizated by Serratia marcescens TOTAL
Infant 18 (69%) 8 (31%) 26 (100%)
Gestational age (wk) 27.8 (26.6;28.9) 27.4 (24.6;30.2) 27.7 (26.6;28.7)
Gender    
 Male 6 (33%) 7 (87%) 13 (50%)
 Female 12 (67%) 1 (13%) 13 (50%)
Birth weight (g) 1100.56 (927;1274.1) 1317.5 (804.5;1830.5) 1167 (987.3;1347.3)
Delivery mode    
 Vaginal 6 (33%) 6 (75%) 12 (46%)
 Cesarean section 12 (67%) 2 (25%) 14 (54%)
Antibiotherapy (days)    
 No 1 (6%) 1 (13%) 2 (8%)
 Yes 17 (94%) 7 (87%) 24 (92%)
  <3 days 8 (44%) 3 (37%) 11 (42%)
  >3 days 9 (50%) 4 (50%) 13 (50%)
Bronchopulmonary dysplasia    
 No 11 (61%) 4 (50%) 15 (58%)
 Yes 7 (39%) 4 (50%) 11 (42%)
Chorioamnionitis    
 No 16 (89%) 8 (100%) 24 (92%)
 Yes 2 (11%) 0 (0%) 2 (8%)
Sepsis 4 (22%) 3 (38%) 7 (27%)
Parenteral nutrition, n=22 (days) 7 (5-9.5)a 11 (5.5-12.8)a 7.5 (5-12.8)a
Enteral feeding tube (days) 58 (45.7;69.9) 61.5 (21.9;101.1) 59 (46;72)
Mechanical ventilation, n=16 (days) 2 (0.8-9.5)a 37 (35-37)a 8.5 (1-35.5)a
CPAP, n=21 (days) 11 (5.3-45.8)a 5 (1.8-22)a 9 (5-45)a
Oxygenotherapy, n=20 (days) 27 (2.5-76.3)a 41 (2-92)a 32 (2-84)a
NICUs (days) 43 (27.3-66)a 30.5 (7.8-85.8)a 42 (18.5-77.8)a
Hospital stay (days) 68 (44.8-81.3)a 39 (27-105.5)a 64 (41-90)a
  1. a Median (IQR)