: logi TRUE</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ poisson_test: logi FALSE</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ col_names   :List of 4</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   ..$ study_id  : chr "study_id"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   ..$ site_id   : chr "site_id"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   ..$ patient_id: chr "patient_id"</span>
<span class="r-out co"><span 