Translation, reliability, and validity of the Brazilian-Portuguese version of the Brachial Plexus Outcome Measure scale (BPOM-Br).

To translate and investigate inter-rater reliability, internal consistency, content validity, and construct validity of the Brazilian-Portuguese Version of the Brachial Plexus Outcome Measure Scale (BPOM-Br). The translation followed international guidelines. Inter-rater reliability was tested with 51 individuals with Neonatal Brachial Plexus Palsy (NBPP), aged between 4 to 16 years old. To determine concurrent construct validity, children were also assessed with the Mallet Scale. Statistical analysis included Bland-Altman, Intraclass Correlation Coefficient (ICC), Floor and Ceiling and effect, and Pearson correlation. The majority of the sample consisted of children with upper NBPP (75.2%), mean age of 8.9 years old. BPOM-Br showed appropriate content validity (comprehensiveness) according to rehabilitation professionals. It also showed excellent inter-rater reliability (ICC = 0.90) and internal consistency (α = 0.91). Bland-Altman analysis showed bias close to zero. Finally, BPOM-Br showed overall significant positive correlations with the Mallet scale items (rs= 0.31 to 0.78 BPOM-Br is a consistent, reliable, and valid instrument to assess activity of school-aged children with NBPP.IMPLICATIONS FOR REHABILITATIONThe Brazilian-Portuguese Version of the Brachial Plexus Outcome Measure Scale (BPOM-Br) presents understandable items and no ceiling and floor effects.The BPOM-Br provides a valid and reliable version for use in Brazilian school-aged children with neonatal brachial plexus palsy.It is important to promote its use both in clinical practice and in research as a specific evaluation of activity domain.