OBJECTIVE: To determine the 6-minute step test's (6MST) reliability and validity and to establish reference performance values of this test. DESIGN: Prospective observational cross-sectional study. SETTING: Spirometry and Respiratory Physiotherapy Laboratory, Federal University of São Carlos (institutional). PARTICIPANTS: Ninety-one individuals [42 men and 49 women, mean age = 39 years (SD, 17 years)] without any diagnosed diseases and with normal exercise capacity [6-minute walk test (6MWT) >75% of the predicted normal]. INDEPENDENT VARIABLES: Participants underwent two 6MST on 1 day and two 6MWT on another day in randomized order. Furthermore, age, gender, height, weight, lower limbs length, abdominal circumference, percentage of body fat, and fat-free mass were obtained. MAIN OUTCOME MEASURES: Test-retest reliability was assessed by comparing the findings of the two 6MST using the intraclass correlation coefficient (ICC) and Bland-Altman plot. Validity was assessed by comparing outcomes of the 6MST to outcomes of 6MWT using the Pearson correlation coefficient. A multiple regression analysis was conducted using the stepwise method to develop an equation to predict reference values. RESULTS: The performance (mean steps ± SD) in the first and second test was 149 ± 34 and 149 ± 36 steps, respectively, which was correlated to distance (in meters) in 6MWT (r = 0.72; P < 0.05). Six-minute step test performance was reliable (ICC = 0.9; 95% confidence interval: 0.85-0.93). The equation to predict reference values for the first 6MST was significant (P < 0.001 and R = 0.48): Performance(steps) = 174 to 1.05 × Age(years) to women and Performance(steps) = 209 to 1.05 × Age(years) to men. CONCLUSIONS: Six-minute step test is a reliable and valid test. Moreover, the number of steps may be predicted by demographic and anthropometric variables with moderate strength of prediction. CLINICAL RELEVANCE: Six-minute step test is an exercise test that is easy to be conducted, more tolerable than a graded exercise test, requires fewer equipments and space, and permits better monitoring of the participants. The assessment of the reliability, validity, and reference values will provide a better interpretability for clinicians to use it, especially in primary care.
OBJECTIVE: To determine the 6-minute step test's (6MST) reliability and validity and to establish reference performance values of this test. DESIGN: Prospective observational cross-sectional study. SETTING: Spirometry and Respiratory Physiotherapy Laboratory, Federal University of São Carlos (institutional). PARTICIPANTS: Ninety-one individuals [42 men and 49 women, mean age = 39 years (SD, 17 years)] without any diagnosed diseases and with normal exercise capacity [6-minute walk test (6MWT) >75% of the predicted normal]. INDEPENDENT VARIABLES: Participants underwent two 6MST on 1 day and two 6MWT on another day in randomized order. Furthermore, age, gender, height, weight, lower limbs length, abdominal circumference, percentage of body fat, and fat-free mass were obtained. MAIN OUTCOME MEASURES: Test-retest reliability was assessed by comparing the findings of the two 6MST using the intraclass correlation coefficient (ICC) and Bland-Altman plot. Validity was assessed by comparing outcomes of the 6MST to outcomes of 6MWT using the Pearson correlation coefficient. A multiple regression analysis was conducted using the stepwise method to develop an equation to predict reference values. RESULTS: The performance (mean steps ± SD) in the first and second test was 149 ± 34 and 149 ± 36 steps, respectively, which was correlated to distance (in meters) in 6MWT (r = 0.72; P < 0.05). Six-minute step test performance was reliable (ICC = 0.9; 95% confidence interval: 0.85-0.93). The equation to predict reference values for the first 6MST was significant (P < 0.001 and R = 0.48): Performance(steps) = 174 to 1.05 × Age(years) to women and Performance(steps) = 209 to 1.05 × Age(years) to men. CONCLUSIONS: Six-minute step test is a reliable and valid test. Moreover, the number of steps may be predicted by demographic and anthropometric variables with moderate strength of prediction. CLINICAL RELEVANCE: Six-minute step test is an exercise test that is easy to be conducted, more tolerable than a graded exercise test, requires fewer equipments and space, and permits better monitoring of the participants. The assessment of the reliability, validity, and reference values will provide a better interpretability for clinicians to use it, especially in primary care.
Authors: Leonardo Barbosa Almeida; Mateus Camaroti Laterza; Maria Urbana Pinto Brandão Rondon; Luciana Diniz Nagem Janot de Matos; Catherine L Granger; Linda Denehy; Cristino Carneiro Oliveira; Patricia Fernandes Trevizan; Daniel Godoy Martinez Journal: Support Care Cancer Date: 2022-09-29 Impact factor: 3.359
Authors: Beatriz Carpallo-Porcar; Laura Romo-Calvo; Sara Pérez-Palomares; Carolina Jiménez-Sánchez; Pablo Herrero; Natalia Brandín-de la Cruz; Sandra Calvo Journal: PLoS One Date: 2022-07-19 Impact factor: 3.752
Authors: Magdalena Cuenca-Garcia; Nuria Marin-Jimenez; Alejandro Perez-Bey; David Sánchez-Oliva; Daniel Camiletti-Moiron; Inmaculada C Alvarez-Gallardo; Francisco B Ortega; Jose Castro-Piñero Journal: Sports Med Date: 2022-01-22 Impact factor: 11.928
Authors: Elizabeth S Evans; Terrence Brophy; Matthew R Braswell; Joshua Boyle; G Keith Harris; Ruth H Watkins; Stephen P Bailey Journal: Eur J Appl Physiol Date: 2021-06-26 Impact factor: 3.078