Advancing Preliminary Findings: A Follow-up Study on Parental Education to Prevent Plagiocephaly

Positional plagiocephaly is characterized by cranial asymmetry and can be the result of prolonged uneven pressure on the developing skull. Extrauterine causes include extended time in the supine position, one-sided feeding, or insufficient tummy time. Beyond cosmetic concerns, it can affect visual, auditory, dentofacial, and speech development. Following the "Back-to-Sleep Campaign," prevalence rose to 16% to 22.1% in 6-week-old infants ( Iran J Child Neurol. 2022;16(2):85-92). Despite its extensive impact on development and finances, many caregivers and parents lack awareness, underscoring the need for improved education and prevention strategies.

In this 2-arm, partially blinded randomized controlled trial (June 2022 to April 2025) at UMass Memorial Medical Center, we compared standard care to an educational intervention for plagiocephaly prevention. The primary outcome was cephalic index (CI), measured at 2, 4, and 6 months, with higher values indicating greater deformity. Secondary outcomes included parent-reported adherence to prevention strategies. Group comparisons used unpaired t tests and difference-in-difference models.

A total of 109 subjects were enrolled (intervention, 62; control, 47). The average CI differed significantly between groups at the 4-month mark (control, 89.84; intervention, 86.91; P  = 0.05). Difference-in-difference analysis did not yield statistically significant results at any time point, but all intervention groups had a lower average CI. Survey data assessing parental adherence to plagiocephaly prevention behaviors showed a significant difference at 4 months (control, 15.87; intervention, 13.75; P  = 0.03), with no significant differences at 2 or 6 months.

The intervention was associated with reduced cranial deformation, reaching statistical significance by 4 months. This correlated with better parental compliance, suggesting early education as an effective preventive strategy.