Source: Jack Needleman, Peter Buerhaus, V. Shane Pankratz, Cynthia L. Leibson, Susanna R. Stevens, and Marcelline Harris, New England Journal of Medecine, Vol. 364 No. 11, March 17, 2011
From the abstract:
Cross-sectional studies of hospital-level administrative data have shown an association between lower levels of staffing of registered nurses (RNs) and increased patient mortality. However, such studies have been criticized because they have not shown a direct link between the level of staffing and individual patient experiences and have not included sufficient statistical controls….In this retrospective observational study, staffing of RNs below target levels was associated with increased mortality, which reinforces the need to match staffing with patients’ needs for nursing care.