OTSLPCohortJournal of developmental and behavioral pediatrics : JDBP2017

Academic Achievement Deficits and Their Neuropsychological Correlates in Children Born Extremely Preterm.

Natacha Akshoomoff, Robert M Joseph, H Gerry Taylor and 4 others

PMID 28877090

WHAT IT FOUND

At school age, children born extremely preterm whose IQ scores were above the impaired range had more low math scores than low reading scores.

Language and naming speed tracked reading. Working memory, inhibition and visual skills tracked math.

Key findings

01Among 668 children with verbal and nonverbal IQ scores above 70, low grade-based math scores were more common than low grade-based reading scores (26.9% versus 16.8%).

02Children with reading, math, or combined learning disabilities had lower neuropsychological scores than children without learning disabilities; reading-only children showed naming-speed weakness, and math-only children showed attention and visual-perception weakness.

03The neuropsychological measures uniquely associated with reading included language, working memory, inhibition and naming speed; those uniquely associated with math included working memory, inhibition and visual perception.

STILL TO COME

How it was doneWhat they foundWhat it means for OTsWhat it means for SLPs

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What it does not show

There was no demographically matched term-born control group, so the study cannot precisely estimate how much higher learning disability rates are than expected. The children were assessed at one age, 10 years, in a single testing session, so this does not show how academic difficulties developed over time. The analysis excluded children with severe motor impairment or functional blindness who could not complete valid testing, so it does not describe those children. The main analysis was limited to 668 children with verbal and nonverbal IQ scores above 70, so it does not apply to children with intellectual impairment. The learning disability groups were small, and the authors caution that profile differences between reading-only and math-only groups may reflect small group sizes rather than clear separate profiles. Maternal education was related to achievement and used as a proxy for socioeconomic status, so some differences may reflect social disadvantage rather than preterm birth alone. Information on delayed school entry was not collected, so the reason for being behind grade placement is not fully known.

The easy way to misread this

Do not conclude that preterm birth caused these learning disabilities or that these cognitive profiles are proven intervention targets. The study had no term-born control group, used one assessment at age 10, and adjusted for maternal education, so it shows associations rather than a direct cause.

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