Methods Retrievals were made of all the nursing literature systematic reviews in China in CBM,CNKI and Wanfang Database,and then analyses were made of the obtained data.

• 方法截至2007年12月在CBM、CNKI、万方数据库中,对国内所有期刊杂志中有关系统评价的护理文献进行检索,并对检索结果进行分析。