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Brazilian version of the CHOP INTEND scale: cross-cultural adaptation and validation

Renalli Manuella Rodrigues Alves1,2, Alessandra Paula de Melo Calado3,4, Vanessa Van Der Linden3,4

  • 1Instituto de Medicina Integral Professor Fernando Figueira, Pós-graduação em Saúde Integral, Recife PE, Brazil.

Arquivos De Neuro-Psiquiatria
|October 4, 2023
PubMed

Insights

The Brazilian Portuguese version of the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP INTEND) is a valid and reliable tool for assessing motor function in infants with Spinal Muscular Atrophy (SMA) type I.

Area of Science:

  • Neurology
  • Pediatrics
  • Genetics

Background:

  • Spinal muscular atrophy (SMA) is a rare genetic disorder causing progressive muscle weakness in infants.
  • Type I SMA is the most severe form, impacting motor function significantly.
  • Existing motor function assessment tools have limitations for infants with severe neuromuscular weakness.

Purpose of the Study:

  • To translate and culturally adapt the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP INTEND) into Brazilian Portuguese.
  • To validate the Brazilian version of the CHOP INTEND for assessing infants with SMA type I.
  • To ensure the translated instrument is suitable for the Brazilian population.

Main Methods:

  • The CHOP INTEND underwent translation, synthesis, back-translation, and expert committee review.
  • The final Brazilian version was tested on 13 infants diagnosed with SMA type I.
  • Content validity and inter-rater reliability of the translated scale were assessed.

Main Results:

  • The translation process considered semantic, structural, idiomatic, and cultural equivalence.
  • Agreement rates exceeded 0.8, with an overall content validity index of 0.98.
  • Inter-rater reliability was exceptionally high, with an intraclass correlation coefficient of 0.998.

Conclusions:

  • The Brazilian version of the CHOP INTEND demonstrates semantic and technical equivalence to the original.
  • The translated scale is a valid and reliable instrument for evaluating motor function in Brazilian infants with SMA type I.
  • This validated tool will aid in the clinical assessment and management of SMA type I in Brazil.
Abstract

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