Table 4.
Multiple linear stepwise regression analysis with the 6MWD as dependent variable considering demographic variables and delta heart rate (Equation 2).
| Non-standardized coefficients (B) | 95% Confidence interval for B | p-value | Partial R2 (%) | |
|---|---|---|---|---|
| Constant | 356.658 | 209.36-503.96 | <0.0001 | |
| Age (years) | –2.303 | 21.07-52.23 | <0.0001 | 47.90 |
| Gender* | 36.648 | 1.11-1.63 | <0.0001 | 19.50 |
| Height (cm) | 1.704 | –2.66- –1.95 | <0.0001 | 16.50 |
| ∆ HR | 1.365 | 0.84-2.57 | <0.0001 | 40.60 |
*
Standard error of the estimate =64.3 m. The derived equation for the 6MWD based on the regression analysis was: 6MWDpred=356.658- (2.303×age)+(36.648×gender)+(1.704×height)+(1.365×Î"HR). Male gender=1 and female gender=0