Table 1

Characteristics of the children who did lung function testing at 12 years of age and the subgroup of children from whom tracheal aspirate had been collected at birth

Children who performed lung function testing
n=41
Children with tracheal aspirate and lung function testing
n=20
Neonatal characteristics
Gestational age, weeks+days26+4 (24+4–28+1)25+3 (24+1–27+0)
Birth weight, g854 (686–1143)760 (637–966)
Male/female*20/21 (49%/51%)11/9 (55%/45%)
Surfactant at birth*24 (62%)†17 (85%)
Mechanical ventilation*29 (71%)19 (95%)
Ventilator days3 (0–18)13 (2–24)
BPD*30 (73%)17 (85%)
Anthropometrics at the time of lung function testing
Age, years12.0 (11.9–12.1)12.0 (11.9–12.1)
Height, cm150 (146–157)151 (145–158)
Weight, kg40.3 (36.2–51.1)43.2 (36.3–54.0)
  • BPD is defined as supplemental oxygen at 36 weeks postmenstrual age.

  • *Data are presented as median (IQR) or a number of individuals (in %).

  • †Data are missing from two individuals.

  • BPD, bronchopulmonary dysplasia.