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Bayley iii reliability and validity8/2/2023 Conclusion:īayley-III cognitive and language scores <85 or CB-III scores <80 provide the best definition of moderate-severe neurodevelopmental delay for equivalence with MDI <70. CB-III scores <80 had 98% agreement and produced the same proportion with delay. Bayley-III cognitive and language scores <85 had 99% agreement with MDI <70 and underestimated delay by 1.1%. Bayley-III scores <70 significantly underestimated the proportion with MDI <70. Results:īayley-III cognitive and language scores were close to the normative mean and were higher than BSID-II MDI scores. Agreement between delay classified using MDI scores <70 and various Bayley-III cut-offs was assessed. A combined Bayley-III score (CB-III) was computed. Methods:īSID-II Mental Development Index (MDI) and Bayley-III cognitive and language scales were administered in 185 extremely preterm (<27 wk) children. We have investigated agreement between classifications of delay made using the BSID-II and Bayley-III. As the latest edition of the Bayley Scales (Bayley-III) produces higher scores than its predecessor (BSID-II), there is uncertainty about how to classify moderate–severe neurodevelopmental delay.
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