A statistically significant correlation was observed between the number of steps on the 6MST and the distance covered on the 6MWT (r=0.56; P,0.0001; Figure 1), independent of the severity of COPD (Table 2). This correlation was observed in patients with mild-to-moderate COPD and in patients with severe-to-very-severe COPD (Table 3). The number of steps on the 6MST was correlated with power (W) at the VT and at maximum effort, and Vo2 max (Tables 2 and 4). Similarly, the distance covered on the 6MWT was correlated with power and Vo2 at the VT and at Vo2 max (Table 2). A linear regression showed that the 6MST was related to the 6MWT distance and peak exercise power, independent of age, lung function, and body mass index (Table 4).
A statistically significant correlation was observed between the number of steps on the 6MST and the distance covered on the 6MWT (r=0.56; P,0.0001; Figure 1), independent of the severity of COPD (Table 2). This correlation was observed in patients with mild-to-moderate COPD and in patients with severe-to-very-severe COPD (Table 3). The number of steps on the 6MST was correlated with power (W) at the VT and at maximum effort, and Vo2 max (Tables 2 and 4). Similarly, the distance covered on the 6MWT was correlated with power and Vo2 at the VT and at Vo2 max (Table 2). A linear regression showed that the 6MST was related to the 6MWT distance and peak exercise power, independent of age, lung function, and body mass index (Table 4).
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