Ages and Stages Questionnaire used to measure cognitive deficit in children born extremely preterm

Aim: To validate the Ages and Stages Questionnaire (ASQ) and to measure average cognitive deficit in children born extremely preterm. Methods: Parents of 30 term children aged 36–42 mo completed the ASQ and the children underwent the Wechsler Preschool and Primary Scales of Intelligence—Revised. In a second study, the ASQ was obtained in 22 children born extremely preterm and 19 term children at the age of 35–44 mo. Results: The overall ASQ score correlated significantly with IQ (p=0.007). The children born extremely preterm had an ASQ score of −1.06 SD below the score of the term children (p=0.048). Conclusion: The ASQ identified a developmental deficit of the expected magnitude.