Pediatric Respirology and Critical Care Medicine

ORIGINAL ARTICLE
Year
: 2018  |  Volume : 2  |  Issue : 2  |  Page : 32--35

Correlation between 6-min walk test and cardiopulmonary exercise test in Chinese patients


Pik-Fung Wong, Eric Yat-Tung Chan, Daniel Kwok-Keung Ng, Ka-Li Kwok, Ada Yuen-Fong Yip, Shuk-Yu Leung 
 Department of Pediatrics, Kwong Wah Hospital, Hong Kong SAR, China

Correspondence Address:
Pik-Fung Wong
Department of Paediatrics, Kwong Wah Hospital, Waterloo Road, Hong Kong SAR
China

Aim: The aim of the study was to evaluate the correlation between the 6-min walk test (6MWT) and the cardiopulmonary exercise test (CPET) in Chinese pediatric patients. Methods: A retrospective review was undertaken for Chinese patients with exercise intolerance who had undergone both 6MWT and CPET on the same day over 21 months. Pearson's correlation analysis was used to examine the correlation between the 6-min walk distance (6MWD) and the maximum oxygen uptake (VO2 max). The 6MWD was defined as abnormal if <10th percentile of height-matched reference, and the VO2 maxwas defined as abnormal if <80% predicted. Results: Twenty-nine patients with a mean age of 14.3 ± 3.6 years were included in the study. The correlation coefficient (r) between the 6MWD and the VO2 maxwas 0.457 with P = 0.013. Twenty-six (three excluded as no reference for VO2 maxwas available for age <10 years) patients were analyzed. Using CPET as the gold standard for functional exercise capacity, 6MWT had a positive predictive value (PPV) of 92%, negative predictive value of 29%, sensitivity of 52%, specificity of 80%, and accuracy of 58% for assessing exercise capacity. Conclusion: 6MWT had a high PPV for abnormal CPET. It could still be used as a simple tool to evaluate patients with exercise intolerance.


How to cite this article:
Wong PF, Chan EY, Ng DK, Kwok KL, Yip AY, Leung SY. Correlation between 6-min walk test and cardiopulmonary exercise test in Chinese patients.Pediatr Respirol Crit Care Med 2018;2:32-35


How to cite this URL:
Wong PF, Chan EY, Ng DK, Kwok KL, Yip AY, Leung SY. Correlation between 6-min walk test and cardiopulmonary exercise test in Chinese patients. Pediatr Respirol Crit Care Med [serial online] 2018 [cited 2019 Jul 24 ];2:32-35
Available from: http://www.prccm.org/article.asp?issn=2543-0343;year=2018;volume=2;issue=2;spage=32;epage=35;aulast=Wong;type=0