tal number of previous pregnancies (including fetal deaths
and still births)</p>
</dd>
<dt><code>sex</code></dt><dd><p>&quot;male&quot;</p>
</dd>
<dt><code>race</code></dt><dd><p>mother's race: &quot;asian&quot;, &quot;black&quot;, &quot;mex&quot;,  &quot;mixed&quot;, or &quot;white&quot;</p>
</dd>
<dt><code>age</code></dt><dd><p>mother's age in years at termination of pregnancy</p>
</dd>
<dt><code>ed</code></dt><dd><p>mother's education</p>
</dd>
<dt><code>ht</code></dt><dd><p>mother's height in inches to 