The combined effect of bed-to-nurse ratio and nurse turnover rate on in-hospital mortality based on South Korean administrative data: a cross-sectional study

The bed-to-nurse ratio and nurse turnover rate were jointly associated with patient mortality. When hospitals with a low bed-to-nurse ratio also experienced high nurse turnover, the risk of in-hospital mortality was even greater. The finding of this study will help health policy makers to better understand the importance of both nursing staffing levels and nurse turnover rates. It is necessary to create a comprehensive improvement plan that integrates policies aiming to improve nurse staffing levels and reduce turnover rates into a single strategy.