vef             bnp        afib    bmi_cat</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  Min.   :0.1500   Min.   :1.958   0:345   1:300  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  1st Qu.:0.3100   1st Qu.:2.630   1:340   2:252  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  Median :0.3700   Median :2.888           3:133  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  Mean   :0.3797   Mean   :2.927                  </span>
<span cla