Optimal search strategies for detecting health services research studies in MEDLINE
Optimal search strategies for detecting health services research studies in MEDLINE
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DOI：
10.1503/cmaj.1040512
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发表时间：
2004-11-09
影响因子：
14.6
通讯作者：
Arnold-Oatley, AE
中科院分区：
文献类型：
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作者：
Wilczynski, NL;Haynes, RB;Arnold-Oatley, AE
背景：来自卫生服务研究（HSR）的证据目前在许多期刊上传播得很少，这使得卫生服务研究人员、管理人员和政策制定者很难找到关于临床实践指南和卫生保健服务的适当性、过程、结果、成本和经济学的研究。我们着手开发和测试从MEDLINE数据库检索符合最低质量标准的HSR文章的搜索词。方法：比较MEDLINE（试验）中7445个方法学检索词和短语的检索性能与手工检索2000年68期期刊（共25936篇）的文献（金标准）的检索性能。我们确定了MEDLINE搜索策略的敏感性、特异性和精密度（阳性预测值）。结果：大多数被归类为结果评估的文章，但不到一半的其他类别的文章被认为是方法学上可接受的（成本研究没有应用方法学标准）。结合单个搜索词以最大化灵敏度，同时将特异性保持在50%或更高，导致几个类别的灵敏度在88.1%至100%之间（特异性范围为52.9%至97.4%）。当将术语组合在一起以最大化特异性，同时保持灵敏度在50%或更高时，特异性达到88.8%至99.8%。当将术语组合在一起以最大化灵敏度和特异性，同时最小化两种测量方法之间的差异时，大多数HSR分类策略的灵敏度和特异性至少达到80%。解释：我们验证了从MEDLINE检索高铁文献的敏感和特定的搜索策略。这些策略已由美国国家医学图书馆在www.nlm.nih.gov/nichsr /hedges/search.html上提供给公众使用。
Background: Evidence from health services research (HSR) is currently thinly spread through many journals, making it difficult for health services researchers, managers and,policy-makers to find research on clinical practice guidelines and the appropriateness, process, outcomes, cost and economics of health care services. We undertook to develop and test search terms to retrieve from the MEDLINE database HSR articles meeting minimum quality standards.Methods: The retrieval performance of 7445 methodologic search terms and phrases in MEDLINE (the test) were compared with a hand search of the literature (the gold standard) for each issue of 68 journal titles for the year 2000 (a total of 25 936 articles). We determined sensitivity, specificity and precision (the positive predictive value) of the MEDLINE search strategies.Results: A majority of the articles that were classified as outcome assessment, but fewer than half of those in the other categories, were considered methodologically acceptable (no methodologic criteria were applied for cost studies). Combining individual search terms to maximize sensitivity, while keeping specificity at 50% or more, led to sensitivities in the range of 88.1% to 100% for several categories (specificities ranged from 52.9% to 97.4%). When terms were combined to maximize specificity while keeping sensitivity at 50% or more, specificities of 88.8% to 99.8% were achieved. When terms were combined to maximize sensitivity and specificity while minimizing the differences between the 2 measurements, most strategies for HSR categories achieved sensitivity and specificity of at least 80%.Interpretation: Sensitive and specific search strategies were validated for retrieval of HSR literature from MEDLINE. These strategies have been made available for public use by the US National Library of Medicine at www.nlm.nih.gov/nichsr /hedges/search.html.