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The ability of Bayley‐III scores to predict later intelligence in children born extremely preterm
Author(s) -
Månsson Johanna,
Källén Karin,
Eklöf Eva,
Serenius Fredrik,
Ådén Ulrika,
Stjernqvist Karin
Publication year - 2021
Publication title -
acta paediatrica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 115
eISSN - 1651-2227
pISSN - 0803-5253
DOI - 10.1111/apa.16037
Subject(s) - bayley scales of infant development , wechsler intelligence scale for children , intelligence quotient , toddler , medicine , wechsler adult intelligence scale , cognition , pediatrics , developmental psychology , psychology , psychomotor learning , psychiatry
Abstract Aim To investigate the ability of the Bayley Scales of Infant and Toddler Development—Third Edition (Bayley‐III), scores to predict later Wechsler Intelligence Scale for Children—Fourth Edition (WISC‐IV), performances in a cohort of children born extremely preterm. Methods 323 children, born <27 gestational weeks, were tested with the Bayley‐III at corrected age 2.5 years and with the WISC‐IV at 6.5 years. Regression analyses investigated the association between Bayley‐III scores and WISC‐IV full‐scale intelligence quotient (IQ). The ability of Bayley‐III Cognitive Index scores to predict low IQ was evaluated using receiver operating characteristic curves. Results Bayley‐III Cognitive Index scores and IQ had a moderately positive correlation and accounted for 38% of the IQ variance. Using a Bayley‐III cut‐off score of 70, the sensitivity to detect children with IQ<70 was 18%, and false positive rate was 7%. A Bayley‐III cut‐off score of 85 corresponded to sensitivity and false positive rates of 44% and 7%, respectively. Conclusions Results emphasise the relative importance of Bayley‐III Cognitive Index scores as predictors of IQ. An 85 score cut‐off for suspecting subnormal IQ is supported. A less conservative threshold would increase identification of true cases yet increase the risk of wrongly diagnosing children.