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

aMaximum subgroup sample size.bConfidence interval.cP-value for Wald-F test.dRate ratio.eRate ratio from log-linear regression model that adjusted for age, sex, race, days of stay, type of admission, cancer, pneumonia, and fractures.fReferent rate ratio = 1.00.gEstimate may not be reliable due to underreporting of race information.hUnstable estimate due to small subgroup size.