Reading and Interpreting the Scientific Evidence

References 

1. Burns N, Grove SK. The practice of nursing research: Appraisal, synthesis, and generation of evidence. 6th ed.. St. Louis, MO: Elsevier; 2009;
2. Munro BH. Statistical methods for health care research. 5th ed.. Philadelphia, PA: Lippincott, Williams & Wilkins; 2005;
3. Polit DF, Beck CT. Nursing research: Generating and assessing evidence for nursing practice. Philadelphia, PA: Lippincott Williams & Wilkins; 2007;
4. U.S. Preventive Services Task Force of the Agency for Healthcare Research and Quality . Grade definitions after May 2007. Retrieved from http://www.ahrq.gov/clinic/uspstf/grades.htm2008;