;</span> protime  0.19714026 0.58802048</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Standardize mean differences</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                1 vs 2</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> time     0.0166658751</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> age      0.2702619258</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> bili