The purpose of the present study was to evaluate the reliability and responsiveness of the incremental shuttle walk test (ISWT) to estimate exercise capacity in patients with pulmonary arterial hypertension (PAH). This was a cross-sectional longitudinal study performed on stable PAH patients (n=30, mean age ± standard deviation, 60±13.6 years) with World Health Organization functional class II & III. Reliability was assessed by comparing the distance covered between ISWT-1 (initial) and ISWT-2 (retest). Responsiveness was determined by comparing the distance covered in the ISWT-3 post pulmonary rehabilitation (PR) to the ISWT-1. The distance covered between ISWT-1 (177±87.85 m) and ISWT-2 (191.67±96.39 m) was not statistically significant. The result of the relative reliability has shown to be excellent with an intraclass correlation coefficient (ICC2,1 = 0.98, 95%CI = 0.95-0.99). Absolute reliability was evaluated through the standard error of the measurement and minimal detectable change at a 95% confidence interval (MDC95) were 12.29 and 33.9 m, respectively. Bland Altman plot showed good agreement between the two ISWTs. Following PR, the effect size (ES=0.78) and standardised response mean (SRM=1.50) were moderate and large respectively. ISWT is considered to be a reliable and responsive measure to estimate exercise capacity in patients with PAH. The ISWT may be considered a suitable alternative tool over a 6-min walk test and in the absence of equipment availability or expertise for conducting cardiopulmonary exercise test for the assessment of exercise capacity in these patients.
RESEARCH ARTICLE
Reliability and responsiveness of incremental shuttle walk test to estimate exercise capacity in patients with pulmonary arterial hypertension
R. Ishrat Related information
1Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi 110025, India.
, A. Mujaddadi Related information1Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi 110025, India.
, M.S. Ali Related information2Department of Pulmonary Rehabilitation, Metro Centre for Respiratory Diseases, Metro Hospital and Multispecialty Institute, Noida 201301, Uttar Pradesh, India.
, D. Talwar Related information3Department of Pulmonology Allergy sleep and critical care medicine, Metro Centre for Respiratory Diseases, Metro Hospital and Multispecialty Institute, Noida 201301, Uttar Pradesh, India.
, M.E. Hussain Related information1Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi 110025, India.
*Corresponding author: ehusain@jmi. ac. in
*Corresponding author: ehusain@jmi.
Comparative Exercise Physiology: 0
(0)- Pages: 1 - 8
Published Online: January 14, 2020
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Comparative Exercise Physiology
Comparative Exercise Physiology
Print ISSN: 1755-2540
Online ISSN: 1755-2559
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