Clinical Parameters | Term infants n = 344 | Preterm infants n = 31 | P value |
---|---|---|---|
Demographic data | |||
  Sex (male, %) | 224(65.1) | 24(77.4) | 0.166 |
  Age at admission (median, IQR, days) | 19.0(13.3–24.0) | 28(26–40) |  < 0.001 |
  PMA (mean ± std, weeks) | 41.7 ± 1.5 | 37.8 ± 2.3 |  < 0.001 |
Virus type | |||
  RSV (n, %) | 308(89.5) | 16(51.6) |  < 0.001 |
  PIV3(n, %) | 24(7.0) | 11(35.5) |  < 0.001 |
  Other viruses (n, %) | 12(3.5) | 3(9.7) | 0.228 |
  RSV and PIV3 coinfection (n, %) | 1(0.3) | 0(0.0) | 0.999 |
Co-infection distribution | |||
  Co-infection with bacteria (total, n, %) | 117(34.0) | 23(74.2) |  < 0.001 |
  Gram positive bacteria (n, %) | 56(16.3) | 6(19.4) | 0.659 |
  Staphylococcus aureus (n, %) | 39(11.3) | 3(9.7) | 0.999 |
  Streptococcus viridans (n, %) | 17(4.9) | 3(9.7) | 0.480 |
  Gram negative bacteria (n, %) | 61(17.7) | 17(54.8) |  < 0.001 |
  Escherichia coli (n, %) | 26(7.6) | 6(19.4) | 0.055 |
  Klebsiella pneumoniae (n, %) | 14(4.1) | 8(25.8) |  < 0.001 |
  Moraxella catarrhalis (n, %) | 12(3.5) | 1(3.2) | 0.999 |
  Aerobacter cloacae (n, %) | 5(1.5) | 0(0) | 0.999 |
  Enterobacter aerogenes (n, %) | 2(0.6) | 1(3.2) | 0.596 |
  Haemophilus influenzae (n, %) | 2(0.6) | 0(0) | 0.999 |
  Proteus mirabilis (n, %) | 0(0) | 1(3.2) | 0.129 |
  Mycoplasma (n, %) | 2(0.6) | 1 | 0.596 |