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Reference equation for the 6-minute walk test in healthy North Indian adult males

Authors: Vaish, H.1; Ahmed, F.1; Singla, R.2; Shukla, D. K.3

Source: The International Journal of Tuberculosis and Lung Disease, Volume 17, Number 5, 1 May 2013 , pp. 698-703(6)

Publisher: International Union Against Tuberculosis and Lung Disease

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Abstract:

SETTING: Lala Ram Swarup Institute of Tuberculosis and Respiratory Diseases, New Delhi, India.

BACKGROUND: The 6-min walk distance (6MWD) correlates well with functional capacity. However, previous reference equations for the 6MWD have failed to accurately predict the 6MWD due to variations in population ethnicity and geography.

OBJECTIVE: The aims of this study were 1) to measure 6MWD in healthy North Indian adult males, 2) to determine the applicability of Enright and Sherrill's reference equation to healthy North Indian adult males, and 3) to develop a regression equation for Indian males.

DESIGN: After physical examination and investigations, the 6-minute walk test was conducted in male subjects aged 40–60 years.

RESULTS: The mean (±SD) 6MWD was 536.1 ± 46.9 m. Enright and Sherrill's reference equation did not correctly predict distance in an Indian population: walk distance was overestimated by a mean (±SD) of 46.8 ± 32.9 m. The regression equation developed for males was 6MWD (m) = 3.654 × height (cm) − 4.139 × age (years) + 127.121, and accounted for 63.9% of total variance.

CONCLUSIONS: Enright and Sherrill's equation cannot be used to predict the 6MWD in healthy North Indian adult males. The new regression equation is expected to prove useful for various purposes in healthy North Indian adult males.

Keywords: 6MWD; ethnic variations; evaluation; functional capacity

Document Type: Research Article

DOI: http://dx.doi.org/10.5588/ijtld.12.0474

Affiliations: 1: Department of Rehabilitation Sciences, Hamdard Institute of Medical Sciences and Research, Jamia Hamdard (Hamdard University), New Delhi, India 2: Department of Tuberculosis and Respiratory Diseases, Lala Ram Swarup Institute of Tuberculosis and Respiratory Diseases, New Delhi, India 3: Division of Non Communicable Diseases, Indian Council of Medical Research, New Delhi, India

Publication date: May 1, 2013

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  • The International Journal of Tuberculosis and Lung Disease publishes articles on all aspects of lung health, including public health-related issues such as training programmes, cost-benefit analysis, legislation, epidemiology, intervention studies and health systems research. The IJTLD is dedicated to the continuing education of physicians and health personnel and the dissemination of information on tuberculosis and lung health world-wide.

    Certain IJTLD articles are selected for translation into French, Spanish, Chinese or Russian. They are available on the Union website

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