Press release: http://www.ahrq.gov/news/press/pr2002/strengpr.htm - Summary:http://www.ahrq.gov/clinic/epcsums/strengthsum.htm - Report in a downloadable zipped file of the full report: http://www.ahrq.gov/clinic/evrptfiles.htm#strength - Fact Sheet: http://www.ahrq.gov/clinic/epcsums/strenfact.htm. The report identifies and compares systems that rate the quality of evidence in individual research studies and compilations of studies addressing a common scientific issue. The report also provides guidance on the leading approaches currently in use for improving the quality of scientific evidence. Using well-specified criteria, the researchers identified 19 study-quality and 7 strength-of-evidence grading systems that people conducting systematic reviews and technology assessments can use as starting points for future evidence-based research projects. This message from the Division of Health and Human Development, PAHO/WHO, is part of an effort to disseminate information related to Equity, Health inequality; socioeconomic inequality in health; socioeconomic health differentials. Gender, Violence, Poverty, Health Economics, Health Legislation, Ethnicity, Ethics, Information Technology and Virtual Libraries, Research & Science issues. PAHO/WHO Website: http://www.paho.org/English/HDP/equidad-list-about.htm EQUIDAD List - Archives: http://listserv.paho.org/Archives/equidad.html