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Vol. 90. Issue 3.
Pages 250-257 (May - June 2014)
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Vol. 90. Issue 3.
Pages 250-257 (May - June 2014)
ARTIGO ORIGINAL
Open Access
Comparison of six-minute walk test in children with moderate/severe asthma with reference values for healthy children
Comparação do teste de caminhada de 6 minutos em crianças com asma moderada/grave com valores de referência para saudáveis
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Lívia Barboza de Andrade
Corresponding author
, Diogo A.R.G. Silva, Taíza L.B. Salgado, José N. Figueroa, Norma Lucena-Silva, Murilo C.A. Britto
Instituto de Medicina Integral Prof. Fernando Figueira, Recife, PE, Brasil
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J Pediatr (Rio J). 2014;90:215-710.1016/j.jpedp.2014.01.002
Jason E. Lang
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Article information
Abstract
Objective

to compare physical performance and cardiorespiratory responses in the six-minute walk test (6MWT) in asthmatic children with reference values for healthy children in the same age group, and to correlate them with intervening variables.

Methods

this was a cross-sectional, prospective study that evaluated children with moderate/severe asthma, aged between 6 and 16 years, in outpatient follow-up. Demographic and spirometric test data were collected. All patients answered the pediatric asthma quality of life (QoL) questionnaire (PAQLQ) and level of basal physical activity. The 6MWT was performed, following the American Thoracic Society recommendations. Comparison of means was performed using Student's t-test and Pearson's correlation to analyze the 6MWT with study variables. The significance level was set at 5%.

Results

40 children with moderate or severe asthma were included, 52.5% males, 70% with normal weight and sedentary. Mean age was 11.3 ± 2.1 years, mean height was 1.5± 0.1 m, and mean weight was 40.8 ± 12.6 Kg. The mean distance walked in the 6MWT was significantly lower, corresponding to 71.9% ± 19.7% of predicted values; sedentary children had the worst values. The difference between the distance walked on the test and the predicted values showed positive correlation with age (r = 0.373, p = 0.018) and negative correlation with cardiac rate at the end of the test (r = –0.518, p < 0.001). Regarding QoL assessment, the values in the question about physical activity limitations showed the worst scores, with a negative correlation with walked distance difference (r= –0.311, p = 0.051).

Conclusions

asthmatic children's performance in the 6MWT evaluated through distance walked is significantly lower than the predicted values for healthy children of the same age, and is directly influenced by sedentary life style.

Keywords:
Asthma
Children
Pulmonary function
Quality of life
Resumo
Objetivo

comparar o desempenho físico e cardiorrespiratório do teste de caminhada de seis minutos (TC 6min) em crianças asmáticas com valores de referência para saudáveis da mesma faixa etária e correlacioná-los com variáveis intervenientes.

Métodos

estudo transversal, prospectivo, em crianças com asma moderada/grave, entre seis e 16 anos, em acompanhamento ambulatorial. Coletaram-se dados demográficos e espirométricos. Os pacientes responderam questionário de qualidade de vida em asma (PAQLQ) e nível de atividade física basal. O TC 6min foi realizado segundo recomen- dações da American Thoracic Society. Para comparações de médias usou-se teste t e correlação de Pearson para analisar o TC 6min com variáveis estudadas. Nível de signi- ficância de 5%.

Resultados

incluídas 40 crianças, 52,5% meninos, 70% eutróficas e sedentárias. A média deidade 11,3 ± 2,1 anos, altura 1,5 ± 0,1 m e peso 40,8 ± 12,6 Kg. A média da distância percorrida no TC 6min foi significativamente inferior correspondendo a 71,9% ± 19,7 dos valores previstos, onde as crianças sedentárias exibiram os piores valores. A diferença entre a distância percorrida no teste e os valores preditos mostrou correlação positiva com a idade (r = 0,373, p = 0,018) e negativa com a frequência cardíaca ao final do teste (r = –0,518, p < 0,001). Na avaliação da qualidade de vida, os valores do quesito limitações das atividades físicas, demonstraram pior pontuação com correlação negativa com a diferença das distâncias percorridas (r = –0,311,p = 0,051).

Conclusões

o desempenho do TC6min em crianças asmáticas avaliado através da dis- tância percorrida é significativamente inferior aos valores previstos para saudáveis da mesma faixa etária, sendo influenciado diretamente pelo sedentarismo.

Palavras-chave:
Asma
Crianças
Função pulmonar
Qualidade de vida
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Como citar este artigo: de Andrade LB, Silva DA, Salgado TL, Figueroa JN, Lucena-Silva N, Britto MC. Comparison of six-minute walk test in children with moderate/severe asthma with reference values for healthy children. J Pediatr (Rio J). 2014;90:250-7.

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