Assessment of Deformational Plagiocephaly Severity and Neonatal Developmental Delay.

Deformational plagiocephaly (DP) in infants has been associated with developmental delay that can last until adolescence. Despite this association and a 5-fold increase in incidence of DP over the past 2 decades, there are currently no guidelines regarding screening for developmental delay or identification of which infants with DP are at the greatest risk of delay. A prospective, nonrandomized study was performed. Infants diagnosed with DP who had no prior intervention were eligible for enrollment. Cranial deformity was measured by cross-cranial measurements using calipers, and developmental delay was measured using the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III). Correlation between cranial deformity and developmental delay was analyzed using a linear regression. Twenty-seven infants, ages 4.0 to 11.0 months (mean = 6.61 months) diagnosed with DP were studied. Developmental delay was observed on the composite language (n = 3 of 27, 11%), and composite motor (n = 5 of 23, 22%) scales, but not the cognitive scale. Severity of cranial deformity did not correlate with scores on any Bayley-III scales (cognitive R = 0.058, P = 0.238; composite language R = 0.03, P = 0.399; composite motor R = 0.0195, P = 0.536). This study demonstrates that severity of cranial deformity cannot be used to predict presence or degree of developmental delay. Craniofacial surgeons should be aware of this risk and consider developmental screening based on clinical suspicion.