diff --git a/slides.Rmd b/slides.Rmd
index 75017a5..0bd31f6 100644
--- a/slides.Rmd
+++ b/slides.Rmd
@@ -590,7 +590,7 @@ test.new.var(old.vars, "year", 5)
 
 `year` has the smallest $p$-value
 
-## `tx.type` + `age.rec` + `hla.match` + `age.donor` + `year`
+## `tx.type` + `age.rec` + `hla.match` + `age.donor` + `year` + ?
 
 ```{r, echo=TRUE}
 old.vars <- c("tx.type", "age.rec", "hla.match", "age.donor", "year")
@@ -613,7 +613,7 @@ cox.full <- coxph(surv.full, data = dat, method = "breslow")
 cox.full
 ```
 
-```{r, fig.width=7, fig.height=5}
+```{r, fig.width=6, fig.height=6}
 tidy(cox.full, exponentiate = TRUE, conf.int = TRUE) |>
   mutate(
     term = recode(
@@ -635,7 +635,7 @@ tidy(cox.full, exponentiate = TRUE, conf.int = TRUE) |>
   geom_point(size = 2) +
   labs(
     title = "Hazard Ratios from Full Cox Model",
-    x = "Hazard Ratio",
+    x = "Log Hazard Ratio",
     y = NULL
   ) +
   my.theme
@@ -696,6 +696,59 @@ tidy(cox.full.1, exponentiate = TRUE, conf.int = TRUE) |>
 ```
 
 
+```{r, fig.width=6, fig.height=6}
+hr.full <- tidy(cox.full, exponentiate = TRUE, conf.int = TRUE)
+hr.full.1 <- tidy(cox.full.1, exponentiate = TRUE, conf.int = TRUE)
+hr.compare <- bind_rows(
+  hr.full |>
+    mutate(model = "Full model with year"),
+  hr.full.1 |>
+    mutate(model = "Model without year")
+) |>
+  mutate(
+    term = recode(
+      term,
+      "tx.typeLiving" = "Living donor",
+      "age.rec" = "Recipient age",
+      "hla.match" = "HLA match",
+      "age.donor" = "Donor age",
+      "year" = "Transplant year"
+    ),
+    term = factor(
+      term,
+      levels = c(
+        "Transplant year",
+        "Living donor",
+        "Recipient age",
+        "Donor age",
+        "HLA match"
+      )
+    )
+  )
+ggplot(hr.compare, aes(x = estimate, y = term, color = model)) +
+  geom_vline(xintercept = 1, linetype = "dashed") +
+  geom_errorbarh(
+    aes(xmin = conf.low, xmax = conf.high),
+    height = 0.2,
+    position = position_dodge(width = 0.6)
+  ) +
+  geom_point(
+    size = 2.5,
+    position = position_dodge(width = 0.6)
+  ) +
+  scale_x_log10() +
+  labs(
+    title = "Hazard Ratios from Cox Models",
+    x = "Log Hazard Ratio",
+    y = NULL,
+    color = NULL
+  ) +
+  my.theme
+```
+
+
+
+
 
 
 
diff --git a/slides.html b/slides.html
index 1cc2c98..b374ce6 100644
--- a/slides.html
+++ b/slides.html
@@ -2637,7 +2637,7 @@ n= 9433, number of events= 449
 <p><code>year</code> has the smallest <span class="math inline">\(p\)</span>-value</p>
 </section>
 <section id="tx.type-age.rec-hla.match-age.donor-year" class="level2" data-number="12.6">
-<h2 data-number="12.6" class="anchored" data-anchor-id="tx.type-age.rec-hla.match-age.donor-year"><span class="header-section-number">12.6</span> <code>tx.type</code> + <code>age.rec</code> + <code>hla.match</code> + <code>age.donor</code> + <code>year</code></h2>
+<h2 data-number="12.6" class="anchored" data-anchor-id="tx.type-age.rec-hla.match-age.donor-year"><span class="header-section-number">12.6</span> <code>tx.type</code> + <code>age.rec</code> + <code>hla.match</code> + <code>age.donor</code> + <code>year</code> + ?</h2>
 <div class="cell">
 <div class="sourceCode cell-code" id="cb88"><pre class="sourceCode r code-with-copy"><code class="sourceCode r"><span id="cb88-1"><a href="#cb88-1" aria-hidden="true" tabindex="-1"></a>old.vars <span class="ot">&lt;-</span> <span class="fu">c</span>(<span class="st">"tx.type"</span>, <span class="st">"age.rec"</span>, <span class="st">"hla.match"</span>, <span class="st">"age.donor"</span>, <span class="st">"year"</span>)</span>
 <span id="cb88-2"><a href="#cb88-2" aria-hidden="true" tabindex="-1"></a></span>
@@ -2711,7 +2711,7 @@ n= 9433, number of events= 9433
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-40-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-40-1.png" class="img-fluid figure-img" width="576"></p>
 </figure>
 </div>
 </div>
@@ -2766,6 +2766,15 @@ n= 9433, number of events= 9433
 </div>
 </div>
 </div>
+<div class="cell">
+<div class="cell-output-display">
+<div>
+<figure class="figure">
+<p><img src="slides_files/figure-html/unnamed-chunk-46-1.png" class="img-fluid figure-img" width="576"></p>
+</figure>
+</div>
+</div>
+</div>
 <hr>
 <p>TODO: write a more generic function (UPDATE: FAILED)</p>
 <details>
@@ -2798,7 +2807,7 @@ n= 9433, number of events= 9433
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-49-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-50-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -2807,7 +2816,7 @@ n= 9433, number of events= 9433
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-50-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-51-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -2896,42 +2905,42 @@ GLOBAL    52.00  5 5.4e-10</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-54-1.png" class="img-fluid figure-img" width="960"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-55-1.png" class="img-fluid figure-img" width="960"></p>
 </figure>
 </div>
 </div>
 <div class="cell-output-display">
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 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-54-2.png" class="img-fluid figure-img" width="960"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-55-2.png" class="img-fluid figure-img" width="960"></p>
 </figure>
 </div>
 </div>
 <div class="cell-output-display">
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 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-54-3.png" class="img-fluid figure-img" width="960"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-55-3.png" class="img-fluid figure-img" width="960"></p>
 </figure>
 </div>
 </div>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-54-4.png" class="img-fluid figure-img" width="960"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-55-4.png" class="img-fluid figure-img" width="960"></p>
 </figure>
 </div>
 </div>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-54-5.png" class="img-fluid figure-img" width="960"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-55-5.png" class="img-fluid figure-img" width="960"></p>
 </figure>
 </div>
 </div>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-54-6.png" class="img-fluid figure-img" width="960"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-55-6.png" class="img-fluid figure-img" width="960"></p>
 </figure>
 </div>
 </div>
@@ -2952,7 +2961,7 @@ GLOBAL    52.00  5 5.4e-10</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-56-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-57-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -2961,7 +2970,7 @@ GLOBAL    52.00  5 5.4e-10</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-57-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-58-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -3009,16 +3018,7 @@ Note
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-59-1.png" class="img-fluid figure-img" width="672"></p>
-</figure>
-</div>
-</div>
-</div>
-<div class="cell">
-<div class="cell-output-display">
-<div>
-<figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-60-1.png" class="img-fluid figure-img" width="768"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-60-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -3036,7 +3036,7 @@ Note
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-62-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-62-1.png" class="img-fluid figure-img" width="768"></p>
 </figure>
 </div>
 </div>
@@ -3050,6 +3050,15 @@ Note
 </div>
 </div>
 </div>
+<div class="cell">
+<div class="cell-output-display">
+<div>
+<figure class="figure">
+<p><img src="slides_files/figure-html/unnamed-chunk-64-1.png" class="img-fluid figure-img" width="672"></p>
+</figure>
+</div>
+</div>
+</div>
 <div class="callout callout-style-default callout-note callout-titled">
 <div class="callout-header d-flex align-content-center">
 <div class="callout-icon-container">
@@ -3080,15 +3089,6 @@ Note
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-65-1.png" class="img-fluid figure-img" width="672"></p>
-</figure>
-</div>
-</div>
-</div>
-<div class="cell">
-<div class="cell-output-display">
-<div>
-<figure class="figure">
 <p><img src="slides_files/figure-html/unnamed-chunk-66-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
@@ -3121,6 +3121,15 @@ Note
 </div>
 </div>
 </div>
+<div class="cell">
+<div class="cell-output-display">
+<div>
+<figure class="figure">
+<p><img src="slides_files/figure-html/unnamed-chunk-70-1.png" class="img-fluid figure-img" width="672"></p>
+</figure>
+</div>
+</div>
+</div>
 </section>
 <section id="cold-ischemia-time-cold.isc" class="level3" data-number="14.4.4">
 <h3 data-number="14.4.4" class="anchored" data-anchor-id="cold-ischemia-time-cold.isc"><span class="header-section-number">14.4.4</span> Cold Ischemia Time <code>cold.isc</code></h3>
@@ -3138,15 +3147,6 @@ Note
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-71-1.png" class="img-fluid figure-img" width="672"></p>
-</figure>
-</div>
-</div>
-</div>
-<div class="cell">
-<div class="cell-output-display">
-<div>
-<figure class="figure">
 <p><img src="slides_files/figure-html/unnamed-chunk-72-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
@@ -3161,6 +3161,15 @@ Note
 </div>
 </div>
 </div>
+<div class="cell">
+<div class="cell-output-display">
+<div>
+<figure class="figure">
+<p><img src="slides_files/figure-html/unnamed-chunk-74-1.png" class="img-fluid figure-img" width="672"></p>
+</figure>
+</div>
+</div>
+</div>
 </section>
 <section id="transplant-type-tx.type" class="level3" data-number="14.4.5">
 <h3 data-number="14.4.5" class="anchored" data-anchor-id="transplant-type-tx.type"><span class="header-section-number">14.4.5</span> Transplant Type <code>tx.type</code></h3>
@@ -3183,7 +3192,7 @@ Cadaveric    Living
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-76-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-77-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -3202,15 +3211,6 @@ Cadaveric    Living
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-78-1.png" class="img-fluid figure-img" width="672"></p>
-</figure>
-</div>
-</div>
-</div>
-<div class="cell">
-<div class="cell-output-display">
-<div>
-<figure class="figure">
 <p><img src="slides_files/figure-html/unnamed-chunk-79-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
@@ -3243,6 +3243,15 @@ Cadaveric    Living
 </div>
 </div>
 </div>
+<div class="cell">
+<div class="cell-output-display">
+<div>
+<figure class="figure">
+<p><img src="slides_files/figure-html/unnamed-chunk-83-1.png" class="img-fluid figure-img" width="672"></p>
+</figure>
+</div>
+</div>
+</div>
 </section>
 </section>
 <section id="kaplan-meier" class="level2" data-number="14.5">
@@ -3263,7 +3272,7 @@ Cadaveric    Living
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-84-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-85-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -3275,7 +3284,7 @@ Cadaveric    Living
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-85-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-86-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -3290,7 +3299,7 @@ Cadaveric    Living
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-89-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-90-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -3900,7 +3909,7 @@ Score (logrank) test = 54.76  on 3 df,   p=8e-12</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-93-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-94-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -4408,7 +4417,7 @@ Score (logrank) test = 54.76  on 3 df,   p=8e-12</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-95-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-96-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -4916,14 +4925,14 @@ Score (logrank) test = 54.76  on 3 df,   p=8e-12</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-98-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-99-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-98-2.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-99-2.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -5431,14 +5440,14 @@ Score (logrank) test = 54.76  on 3 df,   p=8e-12</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-100-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-101-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-100-2.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-101-2.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>
@@ -5449,7 +5458,7 @@ Score (logrank) test = 54.76  on 3 df,   p=8e-12</code></pre>
 <div class="cell-output-display">
 <div>
 <figure class="figure">
-<p><img src="slides_files/figure-html/unnamed-chunk-101-1.png" class="img-fluid figure-img" width="672"></p>
+<p><img src="slides_files/figure-html/unnamed-chunk-102-1.png" class="img-fluid figure-img" width="672"></p>
 </figure>
 </div>
 </div>