Estimated case-fatality rates and rate ratios for in-hospital death among hospitalizations with a PE diagnosis, 2001−2008, NHDS, United States.

a<p>Maximum subgroup sample size.</p>b<p>Confidence interval.</p>c<p><i>P</i>-value for Wald-F test.</p>d<p>Rate ratio.</p>e<p>Rate ratio from log-linear regression model that adjusted for age, sex, race, days of stay, type of admission, cancer, pneumonia, and fractures.</p>f<p>Referent rate ratio = 1.00.</p>g<p>Estimate may not be reliable due to underreporting of race information.</p>h<p>Unstable estimate due to small subgroup size.</p

The International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes for identification of selected medical diagnoses, 2001−2008.

a<p>Only three-digit category codes are listed for cancer, pneumonia, and fractures.</p