Villar José, Piaggio Gilda
UNDP/UNFPA/WHO/World Bank, Special Programme of Research, Development and Research Training in Human Reproduction, Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland.
Best Pract Res Clin Obstet Gynaecol. 2005 Feb;19(1):27-35. doi: 10.1016/j.bpobgyn.2004.10.013. Epub 2004 Dec 23.
Selection and evaluation of evidence to identify the most effective treatment modalities is a difficult process. Randomized controlled trials are well accepted as the least biased means of evaluating medical, surgical, screening or preventive manoeuvres. The most commonly used statistical strategy to pool results from trials identified during a systematic review is the meta-analysis. Heterogeneity of trial results should be evaluated, interactions and specific populations identified for the planning of the new large trial.
选择和评估证据以确定最有效的治疗方式是一个困难的过程。随机对照试验被广泛认为是评估医学、外科、筛查或预防措施时偏差最小的方法。在系统评价过程中，汇总所识别试验结果最常用的统计策略是荟萃分析。应评估试验结果的异质性，识别相互作用和特定人群，以便规划新的大型试验。
