s from 365 to 7 days prior to admission.
The imputation is based on the <a class="reference external" href="https://www.niddk.nih.gov/health-information/professionals/clinical-tools-patient-management/kidney-disease/laboratory-evaluation/glomerular-filtration-rate/estimating">CKD-EPI equation</a> from the paper
<em>A New Equation to Estimate Glomerular Filtration Rate (Levey et. Al, 2009)</em>.</p>
</dd></dl>

<dl class="method">
<dt id="akiFlagger.AKIFlagger.returnAKIpatients">
<code class="sig-name descna