n_control_exposed</span> <span class="op">/</span> <span class="va">n_control_total</span>,</span>
<span>  N <span class="op">=</span> <span class="va">n_total</span>,</span>
<span>  power <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  s <span class="op">=</span> <span class="fl">1</span><span class="op">/</span><span class="fl">11</span>,</span>
<span>  t <span class="op">=</span> <span class="va">n_total_by_age</span> <span class="op">/</span> <span class="va">n_total</span>,</span