ass="r-out co"><span class="r-pr">#&gt;</span>   platelet (mean (SD))     0.555          0.067</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   protime (mean (SD))      0.197          0.146</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   stage (%)                0.205 exact    0.246</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      1                                         </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      2                   