Constraint-Induced Movement Therapy For Children With Neonatal Brachial Plexus Palsy: A Randomized Crossover Trial

Aim To determine if constraint-induced movement therapy (CIMT) is more effective than standard care in improving upper-limb activity outcomes in children with neonatal brachial plexus palsy (NBPP).Method Twenty-one children with NBPP (mean age 25mo, SD=10.3, range=17-48mo; 11 males, 10 females) were enrolled in a crossover trial and randomly allocated to first receive CIMT or standard care, each for 8 weeks. The intervention arm consisted of 3 weeks of casting the unaffected limb followed by 5 weeks of transference activities. The Assisting Hand Assessment (AHA) was used to measure bimanual activity performance at baseline, 8 weeks, and 16 weeks, scored by blinded raters. The Pediatric Motor Activity Log-Revised (PMAL-R) was used as a caregiver-reported secondary outcome measure.Results After concealed random allocation (n=21), there were no significant differences on demographics or baseline measures. CIMT was superior compared to control in terms of bimanual activity performance with a mean difference in AHA change score of 4.8 (SD=10.5, p=0.04, Cohen's delta=0.46). There were no significant differences between treatment conditions on the PMAL-R.Interpretation CIMT is favored over standard care for bimanual activity performance. Future research should investigate a longer follow-up period, additional comparator interventions, and analyse differences by participant characteristics.