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Chapter 4
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lmaowisc committed Feb 14, 2025
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2 changes: 1 addition & 1 deletion chapter4.qmd
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Expand Up @@ -28,7 +28,7 @@ This decomposition leaves $\lambda_0(t)$ fully unspecified, focusing on the log-

Estimation of $\beta$ proceeds through a partial-likelihood function that isolates each event’s contribution while conditioning on the subjects at risk. Suppose the observed sample has unique failure times $t_1 < \dots < t_m$, each with a single failing subject denoted by $(j)$. Let $\mathcal{R}_j$ be the risk set at $t_j$, meaning the indices of all subjects still under observation just before $t_j$.

![](images/cox_time_points.png){fig-align="center" width="85%"}
![](images/cox_time_points.png){fig-align="center" width="80%"}

Then the Cox partial likelihood is

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2 changes: 1 addition & 1 deletion docs/chapter4.html
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<p>Estimation of <span class="math inline">\(\beta\)</span> proceeds through a partial-likelihood function that isolates each event’s contribution while conditioning on the subjects at risk. Suppose the observed sample has unique failure times <span class="math inline">\(t_1 &lt; \dots &lt; t_m\)</span>, each with a single failing subject denoted by <span class="math inline">\((j)\)</span>. Let <span class="math inline">\(\mathcal{R}_j\)</span> be the risk set at <span class="math inline">\(t_j\)</span>, meaning the indices of all subjects still under observation just before <span class="math inline">\(t_j\)</span>.</p>
<div class="quarto-figure quarto-figure-center">
<figure class="figure">
<p><img src="images/cox_time_points.png" class="img-fluid quarto-figure quarto-figure-center figure-img" style="width:85.0%"></p>
<p><img src="images/cox_time_points.png" class="img-fluid quarto-figure quarto-figure-center figure-img" style="width:80.0%"></p>
</figure>
</div>
<p>Then the Cox partial likelihood is</p>
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2 changes: 1 addition & 1 deletion docs/sitemap.xml
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</url>
<url>
<loc>https://lmaowisc.github.io/BMI741/chapter4.html</loc>
<lastmod>2025-02-14T00:21:21.078Z</lastmod>
<lastmod>2025-02-14T00:23:08.870Z</lastmod>
</url>
<url>
<loc>https://lmaowisc.github.io/BMI741/chapter6.html</loc>
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