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Published on: October 31, 2025
Cognitive development at 5.5 years of children with chronic lung disease of prematurity
1Department of Woman and Child Health, Karolinska Institute, Stockholm, Sweden.
Insights
Children born very preterm with severe chronic lung disease (CLD) show lasting cognitive and visual-motor deficits at school age. Early intervention programs are recommended for these high-risk infants.
Area of Science:
- Neonatal Medicine
- Developmental Pediatrics
- Pediatric Neurology
Background:
- Infants born prematurely with chronic lung disease (CLD) exhibit developmental impairments.
- Previous studies indicated deficits in cognitive development and eye-hand coordination at 10 months of age.
Purpose of the Study:
- To determine if the effects of CLD on development persist until school age.
- To investigate the impact of CLD severity on long-term neurodevelopmental outcomes.
Main Methods:
- Cognitive abilities and visual-motor skills were assessed in 60 very preterm children at 5.5 years of age.
- Participants included 32 children with CLD and 28 controls, excluding those with intraventricular hemorrhage or periventricular leucomalacia.
- Standardized tests included the Wechsler Preschool and Primary Scale of Intelligence and the Nepsy scale.
Main Results:
- No significant differences in overall cognitive outcomes were observed between children with CLD and controls.
- Children with severe CLD (Grade III) demonstrated significantly lower performance IQ, full-scale IQ, and visual-motor skills compared to controls.
- CLD severity and the need for corrective lenses were significant predictors of cognitive and visual-motor performance.
Conclusions:
- Very preterm children with severe CLD experience persistent deficits in cognition and visual-motor skills into school age.
- These findings highlight the need for targeted intervention programs for preterm infants with severe CLD.
- Neurodevelopmental monitoring and support are crucial for this vulnerable population.
Background:
Preterm infants with chronic lung disease (CLD) had impaired cognitive development and poorer eye-hand coordination at 10 months of age.
Aims:
To study whether this effect of CLD persisted until school age and whether the severity of CLD affected outcome.
Method:
Cognition and visual-motor skills were examined (Wechsler preschool and primary scale of intelligence, and tests from the Nepsy scale) in 60 very preterm children, without intraventricular haemorrhage or periventricular leucomalacia, at 5.5 years of age. Thirty two children suffered from CLD and 28 were controls.
Results:
The groups did not differ significantly in cognitive outcome. Children with CLD and controls attained a full scale intelligence quotient (IQ) of 94.4 and 99.1, a verbal IQ of 99.6 and 101.5, and a performance IQ of 90.9 and 96.7 respectively. Similarly, no difference was found in tests of eye-hand control. However, the children with the most severe form of CLD had significantly lower performance (84.8) and full scale(87.6) IQs and worse visual-motor performance than the controls. CLD grade III, together with the need for glasses or lenses, had a significant impact on the explained variance.
Conclusions:
At school age, children born very preterm and who experienced severe CLD had deficits in cognition, visual-motor perception, and performance. The findings suggest a need to consider intervention programmes for such infants.
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