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Table 2 Characteristics of the examined population stratified by group of patients with or without RDS.

From: Molecular evidence of Ureaplasma urealyticum and Ureaplasma parvum colonization in preterm infants during respiratory distress syndrome

  GROUP 1 (n. 24) GROUP 2 (n. 26) §
  U. urealyticum positive PCR (n. 5) U. parvum positive PCR (n. 10) Ureaplasma negative PCR (n. 9) U. urealyticum positive PCR (n. 4) Ureaplasma negative PCR (n. 22)
Culture identification assay positivity (%) 1 (20) 2 (20) 0 2 (50) 0
Median gestational age, weeks (range) 35+3 (28; 37+5) 31+2 (23+2; 35+2) 32+5 (27+2; 37) 32 (30+5; 34) 32+4 (30; 37)
Median birthweight, g (range) 2530 (1070–3000) 1660 (720–2950) 1930 (1030–2690) 1340 (1140–2260) 1635 (750–3580)
Median days of hospitalisation 30 (22–60) 33 (7*–60) 22 (10–70) 32 (18–42) 23 (4–60)
Median Apgar score, 1' (range) 8 (6–10) 8 (5–10) 4.5 (1–10) 9.5 (8–10) 7 (1–10)
Median Apgar score, 5' (range) 9 (8–10) 9.5 (8–10) 10 (3–10) 9.5 (9–10) 10 (6–10)
Gender, male (%) 1 (20) 3 (30) 2 (22.2) 3 (75) 6 (27.3)
Antenatal steroids (%) 2 (40) 8 (80) 2 (22.2) 3 (75) 8 (36.4)
Antenatal ampicillin (%) 2 (40) 7 (70) 3 (33.3) 2 (50) 6 (27.3)
PROM > 12 hours (%) 0 2 (20) 0 1 (25) 4 (18.2)
Caesarean delivery (%) 3 (60) 5 (50) 6 (66.7) 2(50) 13 (59.1)
Blood culture positive (%) 1 (6.7) 0 1 (11.1) 0 0
Surfactant (%) 5 (100) 10 (100) 5 (55.6) 0 0
PDA (%) 4 (80) 10 (100) 5 (55.6) 1 (25) 7 (31.8)
Neonatal dexamethasone (%) 6 (40)   2 (22.2) 1 (25) 2 (9.1)
Mechanical ventilatory requirement (%), median duration (hours) 5 (100), 60.5 9 (100), 72 6 (66.7), 72 3 (75), 60 4 (18.2), 48
FiO2 > 0.40 (range) 5 (0.40) 9 (0.40–1.00) 5 (0.40–0.90) 0 0
CLD at 28 days (%) 1 (20) 1 (10) 0 1 (25) 0
CLD at 36 weeks (%) 0 0 0 0 0
  1. * patient died; § no patient resulted U. parvum PCR positive in this group.