The Healthcare Cost and Utilization Project (HCUP) has posted a new statistical brief on the following: Patient Safety and Adverse Events, 2011 and 2014. Across hospitals in 34 States, the overall number of patient safety and adverse events for the 13 selected AHRQ Patient Safety Indicators (PSIs) declined from 2011 to 2014, with one exception. In 2014, more than 90 percent of hospitals in 34 States had average or better-than-average risk-adjusted patient safety and adverse event rates for 11 of the 13 PSIs analyzed. This Healthcare Cost and Utilization Project (HCUP) Statistical Brief focuses on 14 (13 individual indicators and 1 composite) of the 19 AHRQ PSIs, as defined by technical specifications posted on the AHRQ Quality Indicator Web site.8 The 14 indicators represented in this Statistical Brief are risk adjusted for age, sex, major diagnostic categories, modified diagnosis related groups, and comorbidities. Some indicators are also adjusted for transfers of patients from other facilities or for severity of complications present on admission to the hospital.