Methods: 133 Newborn infants admitted longer than 3 days to private-sector neonatal intensive care units were enrolled. 113 of these parents were contacted when their infants were 6-months corrected-age. They completed the ASQ (n=60) and the PEDS^® COMBINED (n=65) questionnaires at home. Returned questionnaires were compared using an in-subject design. Concordance between the questionnaires was determined with the kappa coefficient (κ) and Test of Symmetry.

Results: Concordance between the ASQ and PEDS^® COMBINED was 90.7% (κ = 0.82, ρ = 0.05). The ASQ and PEDS^® COMBINED identified 40% and 42% of the cohort with developmental concerns. The ASQ and PEDS^® COMBINED showed excellent interrater agreement, identifying the same infants requiring further developmental assessment. When there was discordance, it was non-significant in the direction of the ASQ being more likely to identify an infant as delayed overall and statistically significant in the direction of the PEDS^® COMBINED being more likely to identify communication delays (ρ = 0.01)

Conclusions: The ASQ and PEDS^® COMBINED identify the same infants with developmental concerns. The PEDS^® COMBINED is more sensitive to communication delays.