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Is It Correct to Correct for Prematurity? Theoretic Analysis of the Bayley-4 Normative Data
1Department of Pediatrics, Southern Illinois University School of Medicine, Springfield, IL.
Insights
Correction for prematurity is essential for accurately assessing cognitive, language, and motor skills in preterm infants up to three years old. This ensures fair comparison with their peers, avoiding developmental disadvantages.
Area of Science:
- Developmental Pediatrics
- Neuroscience
- Child Psychology
Background:
- Preterm infants often exhibit developmental delays compared to full-term peers.
- Standard developmental assessments may not adequately account for the effects of prematurity.
- Accurate functional assessment is crucial for early intervention and support.
Purpose of the Study:
- To evaluate the necessity of prematurity correction for cognitive, language, and motor function.
- To determine appropriate correction timelines across varying degrees of prematurity.
- To assess the impact of correction on developmental assessments at different baseline levels.
Main Methods:
- Utilized Bayley-4 normative data from 1700 typically developing children.
- Analyzed raw scores at baseline functional levels (-2 SD, -1 SD, M) at 6, 12, 24, and 36 months.
- Compared baseline scores with uncorrected scores at 1-4 months premature.
Main Results:
- Cognitive composite scores require correction for all preterm infants up to 2 years and those 4 months premature at 3 years.
- Language and motor composite scores necessitate correction up to 3 years for all degrees of prematurity.
- A 3-point (1/5 SD) cutoff indicated significant differences requiring correction.
Conclusions:
- Failure to correct for prematurity disadvantages preterm infants in cognitive, language, and motor assessments up to age 3.
- Routine correction for prematurity is recommended for accurate developmental evaluation.
- This practice ensures equitable comparison and appropriate support for preterm children.
Objective:
To determine whether correction for prematurity is appropriate for cognitive, language, and motor function at varying degrees of prematurity and at different baseline functional levels.
Methods:
The newly published Bayley-4 normative data on 1700 normal children were used. Raw scores for baseline levels of function (-2 SD, -1 SD, and M) were identified at 6, 12, 24, and 36 months for receptive communication, expressive communication, fine motor, and gross motor scaled scores and cognitive, language, and motor composite scores. Differences between the baseline and uncorrected scores at 4, 3, 2, and 1 months of prematurity were evaluated at each age.
Results:
Using a cutoff of 3 points (1/5 SD), correction is needed for cognitive composite scores at all gestational ages for the first 2 years and in those born 4 months premature at 3 years of age; language and motor composite scores should be corrected to 3 years at all degrees of prematurity.
Conclusion:
Not correcting for prematurity in cognitive, language, and motor function at 3 years and younger places preterm infants at a distinct disadvantage when compared to peers with few exceptions, suggesting that such correction should be routine.
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