"op">(</span><span class="va">AVAL_TTP</span><span class="op">/</span><span class="fl">365.25</span>, <span class="va">Event_TTP</span><span class="op">)</span> <span class="op">~</span> <span class="va">ARMCD</span>, data <span class="op">=</span> <span class="va">IPD</span><span class="op">)</span> <span class="co">#KM curve</span></span>
<span></span>
<span><span class="va">TTP.fit</span> <span class="op">&lt;-</span> <span class="fu"><a href="http://chjackson.github.io/flexsurv-dev/reference/flexsurvreg