• Haibin Guo, Xuan Zhou, Yanyan Li, Yuqi Yang, Hong Yu, Xin Li, Haiyan Yuan, Yushan Chen, Yufei Feng, Jiaoling Huang, and Qing Du.
• Department of Rehabilitation Medicine, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
• Spine. 2024 Jun 15; 49 (12): 840846840-846.

Study DesignA retrospective observational study.ObjectiveTo assess whether the six-minute walk test (6MWT) can predict cardiopulmonary function in children with idiopathic scoliosis (IS) as an alternative to the cardiopulmonary exercise test (CPET).Summary Of Background DataCardiopulmonary functional impairment in the setting of IS is a common health problem. A simple and convenient assessment method is needed.Materials And MethodsWe recruited 65 children (eight male, 57 female) aged 10.70 to 14.84 years old with IS. Radiographic characteristics of the cohort were measured, including Risser's sign and Cobb angle. We measured cardiopulmonary exercise tolerance using both the 6MWT and CPET and their corresponding indicators, including six-minute walking distance (6MWD) and peak oxygen uptake (peak VO 2 ), respectively. Pearson correlation analysis was used to determine the relationship between 6MWT indicators and IS parameters. Linear regression models were used to explore the relationship between 6MWT and CPET response indicators.ResultsOver a third of the cohort (35.4%) had a Risser's sign grade of 0, with 21.5% in grade 2 and 3, respectively. The cohort's mean Cobb angle was 26.02°. 6MWD was significantly positively correlated with Risser's sign ( R =0.258; P =0.038) and change in respiratory rate positively correlated with vertebral rotation ( R =0.264; P =0.034). 6MWD positively correlated with peak VO 2 , peak VO 2 /heart rate (HR), and metabolic equivalents, and negatively correlated with the ventilation equivalent of the carbon dioxide slope (VE/VCO 2 slope) ( P <0.05). These four CPET indicators were found to be predicted from 6MWD in the linear regression model ( P <0.05).ConclusionsCPET response indicators, especially peak VO 2 , can be predicted using 6MWD, among other factors. The 6MWT can therefore be used to rapidly and efficiently predict the cardiorespiratory tolerance of children with IS.Level Of Evidence3.Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc.

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