In 2011, CDC published the first CDC Health Disparities and Inequalities Report (CHDIR). This report examined health disparities in the United States associated with various characteristics, including race/ethnicity, sex, income, education, disability status, and geography. Health disparities were defined as "differences in health outcomes and their determinants between segments of the population, as defined by social, demographic, environmental, and geographic attributes". Among other recommendations, the 2011 CHDIR emphasized the need to address health disparities with a dual intervention strategy that focuses on populations at greatest need and improves the health of the general population by making interventions available to everyone. The 2013 CHDIR included updates on most topics from the 2011 CHDIR and on new topics. Compared with the 2011 CHDIR, the 2013 CHDIR included more reports on social and environmental determinants of health and emphasizes the importance of multisector collaboration. The 2013 CHDIR highlights the need for a "comprehensive, community-driven approach" to reducing health disparities in the United States.