Seminal studies in the United States have shown strong associations between nurses' working conditions and patient safety, with high patient-to-nurse ratios and greater patient turnover being linked to increased mortality. This multinational survey of nurses and patients found that improved nurse work environments and reduced patient-to-nurse ratios were linked to better perceptions of quality and patient satisfaction. Moderately strong correlations were found between patient satisfaction and nursing reports of care quality, although there were wide variations in both measures across different countries. This study lends additional support to the view that improving the work environment for nurses can strengthen patient safety.