 the Nurses’ Health Study explored by <span class="citation">Munoz and Rosner (1984)</span>. This study looked for a
link between oral contraceptives and breast cancer, stratified by age
<span class="citation">(Barton et al. 1980; Hennekens et al.
1984)</span>. The data for this illustration has been included in the
<code>samplesizeCMH</code> package.</p>
<div class="sourceCode" id="cb8"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="fu"><a href="https://rdrr.io/r/utils/d