PICO_S始终贯穿SR
SR1:建立一个规范化问题
• PICO的含义 • 临床问题 vs 基础问题 • PICO的概念延伸
提出研究问题
Population Intervention Comparator Outcomes Study design
PICO_S 始终 贯穿SR
提出临床问题-PICO原则
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注册申请
例子
• Antenatal corticosteroids for accelerating fetal lung maturation for women at risk of preterm birth • Roberts D, Dalziel S Cochrane Database of Systematic Reviews 2006 Issue 3. Copyright © 2006 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.
• 综述的目的:综合研究的证据,得到一个准确的结论
系统评价与Meta分析• 源自976: Gene Glass提出meta分析概念 • Meta分析:合成结果,减少随机误差 • 1993.7:BMJ:
Systematic review=科学综述+meta分析
系统误差
随机误差
Meta分析其实质是一个统计学方法
• O outcome 结果 • 病人经干预处理后得到的结果是什么?
系统综述
1) “焦点” 问题:
定义了干预 定义了对照
The review addresses whether corticosteroids are more effective than placebo or 'no corticosteroids' in reducing the risk of respiratory distress syndrome, neonatal death, intraventricular haemorrhage, necrotising enterocolitis, chronic lung disease in survivors of neonatal intensive care, the use of surfactant in the newborn, the cost of