Table 3

Lung function results

No LRTI (n=86)Viral negative LRTI (n=15)RSV LRTI (n=27)Other viral LRTI (n=31)p Value
Postmenstrual age (weeks)35.9 (35.3–36.5)36.1 (35.7–37.1)35.9 (35.3–36.6)36.1 (35.6–37.5)0.16
Weight (g)2115 (1871–2418)2178 (1978–2477)1972 (1830–2170)1970 (1829–2336)0.10
FRC (ml/kg)25.9 (23.4–28.0)24.7 (21.4–27.4)23.8 (21.3–27.8)24.2 (22.1–28.6)0.54
FRC (ml)58 (48–65)56 (47–63)52 (42–61)51 (43–55)0.10
Crs (ml/cm H2O/kg)1.55 (1.31–1.71)1.47 (1.19–1.53)1.35 (1.08–1.59)1.23 (1.08–1.73)0.11
Crs (ml/cm H2O)3.2 (2.6–3.6)3.4 (2.5–3.9)2.8 (2.1–3.6)2.9 (2.2–3.2)0.031
Rrs (cm H2O/l/s)70 (60–84)69 (62–83)74 (64–81)82 (67–92)0.12
  • Data are expressed as median (range).

  • Crs, compliance of the respiratory system; FRC, functional residual capacity; LTRI, lower respiratory tract infection; Rrs, resistance of the respiratory system; RSV, respiratory syncitial virus.