Bayley Scale of Infant and Toddler Development (BSITD-III). Chronological Or Corrected Age: Which Is More Appropriate to Assess Preterm Infants’ Cognitive, Linguistic, and Motor Performances?

The use of chronological or/and corrected age administering \nBSITD-III in preterm children was investigated in a sample of \npreterm infants and full-term infants. BSITD-III was \nadministered at 12 months corrected age. The performance \nscores for the three BSITD-III subscales were calculated \naccording to the child’ chronological age and considering the \nBSITD-III request for correction referring to the 40th week or \nthe 37th week of gestation. Results indicate that corrected age \nshould be used with the cognitive subscale only, not with the \nMotor nor with the Language ones.