The six-minute walk test in healthy children: Reliability and validity

Albert M. Li, J. Yin, C. C.W. Yu, T. Tsang, H. K. So, E. Wong, D. Chan, E. K.L. Hon, R. Sung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

219 Citations (Scopus)

Abstract

The aim of this study was to assess the reliability and validity of the 6-min walk test (6MWT) in healthy children. Chinese secondary school students were randomly recruited. They attended the current authors' unit on two occasions, separated by 2 weeks. Physical examination and standardised maximum incremental exercise testing on a treadmill were performed on the first visit. Spirometry and 6MWT were carried out on the second visit. A randomly selected subgroup was invited to return for repeat 6MWT at an interval of 2-4 weeks. Seventy-eight subjects were recruited; however, four failed to achieve maximal effort on exercise test. The final group included 43 young females and the mean±SD age of the subjects was 14.2±1.2 yrs. Physical examination was unremarkable in all cases. The mean±SD per cent predicted forced expiratory volume in one second was 91.4±10.2%. Concurrent validity was demonstrated by good correlation between the 6-min walking distance and maximum oxygen uptake determined on the exercise treadmill. Test-retest reliability was undertaken in 52 subjects, and the intraclass correlation coefficient (95% confidence interval) was calculated as 0.94 (0.89-0.96). In addition, Bland and Altman plots demonstrated a high degree of repeatability. In healthy children, the 6-min walk test is a reliable and valid functional test for assessing exercise tolerance and endurance.

Original languageEnglish
Pages (from-to)1057-1060
Number of pages4
JournalEuropean Respiratory Journal
Volume25
Issue number6
DOIs
Publication statusPublished - Jun 2005
Externally publishedYes

Keywords

  • Children
  • Six-minute walk
  • Treadmill exercise

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

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