mmary of categorical variables ### </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> trt: 1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      var   n miss p.miss level freq percent cum.percent</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   status 158    0    0.0     0   83    52.5        52.5</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                              1   10     6.3   