Examining the validity of AHRQ's patient safety indicators (PSIs): is variation in PSI composite score related to hospital organizational factors?
Shin MH, Sullivan JL, Rosen AK, Solomon JL, Dunn EJ, Shimada SL, Hayes J, Rivard PE. Examining the validity of AHRQ's patient safety indicators (PSIs): is variation in PSI composite score related to hospital organizational factors? Med Care Res Rev. 2014 Dec; 71(6):599-618.