Regression equations to estimate the 2-min walk distance in an adult Asian population aged 40–75 years

Fatim T. Mirza, Sue Jenkins, Maria Justine, Nola Cecins, Kylie Hill

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background and objective: There is increased use of the 2-min walk test (2MWT) to assess functional exercise capacity. However, the distance achieved during this test may be difficult to interpret in the absence of reference values from a local population. Regression equations to estimate the 2-min walk distance (2MWD) only exist for American and Brazilian populations. The objective of this study was to develop regression equations to estimate the 2MWD in Malaysian adults who were free from major health problems. Methods: Eighty-seven adults (43 males; mean ± SD age: 57.1 ± 9.6 years) performed two 2MWT using a standardized protocol. Heart rate (HR) was recorded every 30 s during the test. Stepwise multiple regression analysis was performed using age, gender, height, weight and change in HR (ΔHR) as independent variables, and better of the two 2MWD as the dependent variable. A second regression equation, without ΔHR, was planned if ΔHR was retained as one of the predictors of the 2MWD in the first equation. Results: The better of the two 2MWD was 200 ± 34 m. Males walked 33 ± 6 m further than females (P < 0.001). The two regression equations were 196 − 1.1 × age, years + 1.0 × ΔHR, bpm + 31.2 × gender (R2 = 0.73) and 279 − 1.7 × age, years + 35.9 × gender (R2 = 0.47) with females = 0 and males = 1. Conclusion: The equations derived in this study may facilitate the interpretation of the 2MWD in clinical populations in Malaysia, as well as in countries with similar cultural backgrounds to Malaysia.

Original languageEnglish
Pages (from-to)674-680
Number of pages7
JournalRespirology
Volume23
Issue number7
DOIs
Publication statusPublished - 14 Feb 2018
Externally publishedYes

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Heart Rate
Population
Malaysia
Reference Values
Regression Analysis
Weights and Measures
Health
Walk Test

Cite this

Mirza, Fatim T. ; Jenkins, Sue ; Justine, Maria ; Cecins, Nola ; Hill, Kylie. / Regression equations to estimate the 2-min walk distance in an adult Asian population aged 40–75 years. In: Respirology. 2018 ; Vol. 23, No. 7. pp. 674-680.
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abstract = "Background and objective: There is increased use of the 2-min walk test (2MWT) to assess functional exercise capacity. However, the distance achieved during this test may be difficult to interpret in the absence of reference values from a local population. Regression equations to estimate the 2-min walk distance (2MWD) only exist for American and Brazilian populations. The objective of this study was to develop regression equations to estimate the 2MWD in Malaysian adults who were free from major health problems. Methods: Eighty-seven adults (43 males; mean ± SD age: 57.1 ± 9.6 years) performed two 2MWT using a standardized protocol. Heart rate (HR) was recorded every 30 s during the test. Stepwise multiple regression analysis was performed using age, gender, height, weight and change in HR (ΔHR) as independent variables, and better of the two 2MWD as the dependent variable. A second regression equation, without ΔHR, was planned if ΔHR was retained as one of the predictors of the 2MWD in the first equation. Results: The better of the two 2MWD was 200 ± 34 m. Males walked 33 ± 6 m further than females (P < 0.001). The two regression equations were 196 − 1.1 × age, years + 1.0 × ΔHR, bpm + 31.2 × gender (R2 = 0.73) and 279 − 1.7 × age, years + 35.9 × gender (R2 = 0.47) with females = 0 and males = 1. Conclusion: The equations derived in this study may facilitate the interpretation of the 2MWD in clinical populations in Malaysia, as well as in countries with similar cultural backgrounds to Malaysia.",
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Regression equations to estimate the 2-min walk distance in an adult Asian population aged 40–75 years. / Mirza, Fatim T.; Jenkins, Sue; Justine, Maria; Cecins, Nola; Hill, Kylie.

In: Respirology, Vol. 23, No. 7, 14.02.2018, p. 674-680.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Regression equations to estimate the 2-min walk distance in an adult Asian population aged 40–75 years

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AU - Jenkins, Sue

AU - Justine, Maria

AU - Cecins, Nola

AU - Hill, Kylie

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N2 - Background and objective: There is increased use of the 2-min walk test (2MWT) to assess functional exercise capacity. However, the distance achieved during this test may be difficult to interpret in the absence of reference values from a local population. Regression equations to estimate the 2-min walk distance (2MWD) only exist for American and Brazilian populations. The objective of this study was to develop regression equations to estimate the 2MWD in Malaysian adults who were free from major health problems. Methods: Eighty-seven adults (43 males; mean ± SD age: 57.1 ± 9.6 years) performed two 2MWT using a standardized protocol. Heart rate (HR) was recorded every 30 s during the test. Stepwise multiple regression analysis was performed using age, gender, height, weight and change in HR (ΔHR) as independent variables, and better of the two 2MWD as the dependent variable. A second regression equation, without ΔHR, was planned if ΔHR was retained as one of the predictors of the 2MWD in the first equation. Results: The better of the two 2MWD was 200 ± 34 m. Males walked 33 ± 6 m further than females (P < 0.001). The two regression equations were 196 − 1.1 × age, years + 1.0 × ΔHR, bpm + 31.2 × gender (R2 = 0.73) and 279 − 1.7 × age, years + 35.9 × gender (R2 = 0.47) with females = 0 and males = 1. Conclusion: The equations derived in this study may facilitate the interpretation of the 2MWD in clinical populations in Malaysia, as well as in countries with similar cultural backgrounds to Malaysia.

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