[Excerpt from authors] This fact sheet builds on selected content from the Evidence-based Standards for Measuring Nurse Staffing & Performance Study & is based on the completed research of O'Brien-Pallas, L., Thomson, D., McGillis Hall, L., Pink, G., Kerr, M., Wang, S., Li, X. & Meyer, R. (2004). The full report is available on line at www.chsrf.ca or www.nhsru.com.