Objectives: To examine the relationship between neonatal respiratory status and longitudinal respiratory health outcomes in preterm infants with very low birth weight (VLBW, birth weight <1500 g).
Methods: A total of 109 VLBW preterm infants were prospectively assessed for respiratory status using the Toce clinical and radiographic scoring method on a postnatal day 28, and severity of bronchopulmonary dysplasia (BPD) at 36-weeks postmenstrual age (PMA), respiratory morbidity within 1 year of corrected age (CA), pulmonary function test, and six-minute walk test at 4 years of age.
Results: A high Toce clinical score on day 28 was associated with the occurrence of respiratory morbidity within 1 year of CA and poor pulmonary function and functional exercise performance at 4 years of age in VLBW preterm infants (all P < 0.05). BPD at 36-weeks PMA was associated with an increased risk of respiratory morbidity within 1 year of CA and its negative impact on pulmonary function and functional exercise performance at 4 years of age was most pronounced in the severe form (all P < 0.05).
Conclusions: Early assessments of neonatal respiratory status including Toce clinical score and the severity of BPD are valid to identify VLBW preterm infants who are at risk of adverse longitudinal respiratory health outcomes.
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