L. Singer et al., A LONGITUDINAL-STUDY OF DEVELOPMENTAL OUTCOME OF INFANTS WITH BRONCHOPULMONARY DYSPLASIA AND VERY-LOW-BIRTH-WEIGHT, Pediatrics, 100(6), 1997, pp. 987-993
Objective. Bronchopulmonary dysplasia (BPD) is now the leading cause o
f lung disease in US infants. In a large regional cohort, we tested th
e hypothesis that despite innovations in neonatal care, very low birth
weight (VLBW) infants (<1500 g) with BPD had poorer developmental out
comes than nonaffected infants during the first 3 years of life, and t
hat BPD predicted poorer outcome beyond the effects of other risk fact
ors. Methods. Three groups of infants (122 with BPD, 84 VLBW without B
PD, and 123 full-term) were followed longitudinally to 3 years of age
with the Bayley Scales of Mental and Motor Development. Comparison gro
ups of VLBW infants without BPD and full-term infants did not differ i
n sex, race, or socioeconomic status. Statistical analyses included hi
erarchical and stepwise multiple regression. Results. Infants with BPD
performed more poorly at all ages. By 3 years, cognitive and/or motor
development was in the range of retardation (<70 standard score) for
21% to 22% of infants with BPD. In multiple regression analyses contro
lling for socioeconomic and neonatal risk conditions, BPD had an indep
endent negative effect on motor outcome at 3 years. Neurologic risk, a
summary measure of neurologic problems other than intraventricular he
morrhage, and the presence of BPD independently predicted motor delay.
By 3 years, social class, race, and neurologic risk predicted mental
outcome, suggesting that the specific effects of BPD are primarily on
the motor domain. Conclusions. In VLBW infants, BPD predicts poorer mo
tor outcome at 3 years, after control for other risks. Cohorts of infa
nts with BPD also had higher rates of mental retardation, associated w
ith greater neurologic and social risk. These findings underscore the
need for intensive prevention and habilitation efforts for this growin
g group of VLBW survivors, as well as investigation into the potential
role of BPD in the higher rates of learning disabilities in VLBW coho
rts at school age.