Comparison of Second and Third Editions of the Bayley Scales in Children With Suspected Developmental Delay

Area of Science:

• Pediatric Developmental Assessment
• Child Psychology
• Developmental Pediatrics

Background:

• The Bayley Scales of Infant Development are crucial for assessing developmental delays in young children.
• Comparing different editions of developmental scales is essential for accurate diagnosis and intervention.
• The Bayley-III is a newer version of the BSID-II, necessitating validation studies.

Purpose of the Study:

• To compare scores between the Bayley Scales of Infant Development second edition (BSID-II) and the third edition (Bayley-III).
• To identify appropriate cutoff scores for developmental delay using the Bayley-III.
• To evaluate the diagnostic performance of the Bayley-III in children with suspected developmental delay.

Main Methods:

• Sixty-two children under 42 months with suspected developmental delay were assessed using both BSID-II and Bayley-III.
• Data were collected between 2014 and 2015.
• Receiver operating characteristic (ROC) analysis was used to determine cutoff scores.

Main Results:

• The Bayley-III Cognitive Language Composite (CLC) scores were, on average, 5.8 points higher than BSID-II Mental Developmental Index (MDI) scores.
• The Bayley-III Motor Composite (MC) scores were, on average, 7.9 points higher than BSID-II Psychomotor Developmental Index (PDI) scores.
• A BSID-II MDI score <70 corresponded to a Bayley-III CLC cutoff of 78.0 (96.6% sensitivity, 93.9% specificity).
• A BSID-II PDI score <70 corresponded to a Bayley-III MC cutoff of 80.

Conclusions:

• A strong correlation exists between BSID-II and Bayley-III scores in children with suspected developmental delay.
• The Bayley-III identified fewer children with developmental delay compared to the BSID-II.
• Recommended cutoff scores for developmental delay are 78 for Bayley-III CLC and 80 for Bayley-III MC.