['Safer care is a strategic priority for health care organizations worldwide. Yet, the measurement and evaluation of key processes and outcomes associated with safer care remains challenging, even with existing performance measurement indicators. The multi-national Quality Indicator Project (QI Project) data are analysed to [1] document the patterns of safety indicators used between 1999 and 2006 among hospitals in Asia, Europe and the USA; and [2] to identify trends in using both organization-level and patient-level data in hospital performance improvement.', "Retrospective data are used to ascertain how the use of safety indicators has changed in comparison to other QI Project indicators. 'Continent' rather than 'hospital' is used as the unit of analysis and P-values of the differences in use percentages across Asia, Europe and the USA are calculated.", "There was a significant increase in the use of QI Project indicators in Asia between 1999 and 2006. Measured as the mean percentage of usage, the safety versus 'all other' indicators' increase in Asia was 43.7% versus 27% (P < 0.05) and 37.2% versus 24.4% (P < 0.05), respectively, during the study's time period. The European participants used both safety and all other indicators less frequently, 14.7% versus 18% (P < 0.05) and 9.5% versus 19.8% (P < 0.05), respectively. Finally, USA hospitals demonstrated a larger difference in the decrease of QI Project indicator use than European hospitals between the 'safety' and 'all other' indicators, 12.7% decrease for safety indicators and 7.1% for all others (P < 0.05). These findings are consistent with trends reported in a previous study."] Is safety part of quality : a proposal for a continuum in performance measurement?