Figure 1. Risk-Standardized 30-Day Mortality Rates Among Veterans Hospitalized With Heart Failure and Pneumonia From Claims-Based and Clinical Risk-Adjustment Models.

Each point corresponds to the risk-standardized 30-day mortality rate in each quarter between January to March 2009 and July to September 2015 for the reference population of interest. The claims-based model presented for pneumonia did not include an indicator for primary diagnosis.