BACKGROUND Patient safety culture has a positive influence on the effectiveness of patient safety and quality improvement interventions. A study was conducted to gain knowledge about promising best practices used by hospitals to improve patient safety culture hospitalwide. METHODS Agency for Healthcare Research and Quality (AHRQ) Surveys on Patient Safety Culture™ (SOPS) Hospital Survey longi...

The difference between the disease rates of two groups, one exposed and one not exposed to a suspected aetiological factor, is a useful measure of the risk associated with the factor. This measure is of most interest when the association is considered causal, and has been termed the attributable risk (MacMahon and Pugh, 1970). Expressed as a percentage of the total disease rate in a group (the ...