p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
    <p>A tibble with one row per pre-exposure window and four columns: <code>ratio</code> indicates the estimates
incidence rate ratio for the pre-exposure window. <code>lb</code> and <code>ub</code> represent the upper and lower
bounds of the 95 percent confidence interval, and <code>pass</code> is <code>TRUE</code> if the confidence interval
intersects the null bounds