<dt><code>creatinine</code></dt><dd><p>serum creatinine</p>
</dd>
<dt><code>mgus</code></dt><dd><p>1 if the subject had been diagnosed with
monoclonal gammapothy (MGUS)</p>
</dd>
<dt><code>futime</code></dt><dd><p>days from enrollment until death.  Note that
there are 3 subjects whose sample was obtained on their death date.</p>
</dd>
<dt><code>death</code></dt><dd><p>0=alive at last contact date, 1=dead</p>
</dd>
<dt><code>chapter</code></dt><dd><p>for those who died, a grouping of their
primary cause of d