Table 4 Reference equations for 6-min walk distance in Lima and Puno, Peru

$\begin{array}{ll}496.8-2.7\times \hfill & \left(\mathrm{age}-53.9\right)+1.6\hfill \\ \times \left(\mathrm{height}-156.0\right)+0.9\hfill \\ \times \left(\mathrm{weight}-66.8\right)-38.8\hfill \\ \times I\left(\mathrm{female}\right)\hfill \end{array}$

$\begin{array}{ll}433.0-0.9\times \hfill & \left(\mathrm{age}-53.9\right)+2.4\hfill \\ \times \left(\mathrm{height}-156.0\right)-1.3\hfill \\ \times \left(\mathrm{weight}-66.8\right)-37.8\hfill \\ \times I\left(\mathrm{female}\right)\hfill \end{array}$

$\begin{array}{ll}468.8-2.4\times \hfill & \left(\mathrm{age}-53.9\right)+1.1\hfill \\ \times \left(\mathrm{height}-156.0\right)+0.7\hfill \\ \times \left(\mathrm{weight}-66.8\right)-37.5\hfill \\ \times I\left(\mathrm{female}\right)+5.1\hfill \\ \times \left(\Delta \mathrm{Heart}\mathrm{rate}\right)\hfill \end{array}$

$\begin{array}{ll}434.3-1.2\times \hfill & \left(\mathrm{age}-53.9\right)+2.0\hfill \\ \times \left(\mathrm{height}-156.0\right)-1.3\hfill \\ \times \left(\mathrm{weight}-66.8\right)-40.8\hfill \\ \times I\left(\mathrm{female}\right)+2.68\hfill \\ \times \left(\Delta \mathrm{Heart}\mathrm{rate}\right)\hfill \end{array}$