Hospital staff's experiences of unsafe staffing levels and employers' responses to their concerns: a survey.

There is a wealth of evidence that demonstrates a link between inadequate nurse staffing levels and suboptimal patient care. Over the last decade, policies and legislation on safe nurse staffing levels have been developed for specific settings and countries in the UK, all of which emphasise employers' responsibility in responding to staff's concerns about unsafe staffing. However, the effectiveness of mechanisms for monitoring and responding to such concerns is unclear.