• de Assis Pereira Cacau Lucas L Departamento de Fisioterapia e Pós-Graduaçáo em Ciências da Saúde da Universidade Federal de Sergipe, Aracaju, Brazil, as well as The GREAT, Vitor Oliveira Carvalho, Alessandro Dos Santos Pin, Carlos Raphael Araujo Daniel, Daisy Satomi Ykeda, Eliane Maria de Carvalho, Juliana Valente Francica, Luíza Martins Faria, Mansueto Gomes-Neto, Marcelo Fernandes, Marcelo Velloso, Marlus Karsten, Patrícia de Sá Barros, Valter Joviniano de Santana-Filho, TC6minBrasil Investigators, and Authors of the TC6minBrasil study: Steering Committee:.
• Departamento de Fisioterapia e Pós-Graduaçáo em Ciências da Saúde da Universidade Federal de Sergipe, Aracaju, Brazil, as well as The GREAT Group (Grupo de Estudos em Atividade Física), Brazil. lucas.cacau@yahoo.com.br.
• Respir Care. 2018 Mar 1; 63 (3): 339-346.

IntroductionBrazil is a country with great climatic, socioeconomic, and cultural differences that does not yet have a reference value for the 6-min walk test (6MWT) in healthy children. To avoid misinterpretation, the use of equations to predict the maximum walk distance should be established in each country.ObjectivesWe sought to establish reference values and to develop an equation to predict the 6-min walk distance for healthy children in Brazil.MethodsThis is a cross-sectional multi-center study that included 1,496 healthy children, aged 7 to 12 y, assessed across 11 research sites in all regions of Brazil, and recruited from public and private schools in their respective regions. Each child was assessed for weight and height. Walk distance was our main outcome. An open-source software environment for statistical computing was used for statistical analysis.ResultsWe observed a higher average distance walked by boys (531.1 m) than by girls (506.2 m), with a difference of 24.9 m (P < .001). We established 6MWT reference values for boys with the following equation: Distance = (16.86 × age) + (1.89 × Δ heart rate) - (0.80 × weight) + (336.91 × R1) + (360.91 × R2). For girls the equation is as follows: Distance = (13.54 × age) + (1.62 × Δ heart rate) - (1.28 × weight) + (352.33 × R1) + (394.81 × R2).ConclusionReference values were established for the 6MWT in healthy children aged 7-12 y in Brazil.Copyright © 2018 by Daedalus Enterprises.

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