Aker P D, McDermaid C, Opitz B G, White M W
Division of Graduate Studies and Research, Canadian Memorial Chiropractic College, Toronto, Ontario, Canada.
J Manipulative Physiol Ther. 1996 Oct;19(8):518-24.
To determine the efficiency of three computerized bibliographic databases in retrieving literature relevant to the chiropractor.
A cross-sectional design was used. English-language citations from 1990-92, on the topics of scoliosis, sciatica and neck pain, were searched in CHIROLARS, Index to Chiropractic Literature (ICL) and MEDLINE. Citations were assessed for relevance criteria by two assessors; a third assessor was used when both were unsure of relevance. Inter- and intraexaminer reliability of the relevance assessments was determined using the weighted Kappa statistic. The outcomes assessed were search time, search costs, number of citations, relevance, number of unique citations and the number of citations from refereed journals. Relative recall and cost per citation were used as primary measures of database efficiency.
A total of 846 citations were retrieved. After exclusions, 786 citations were assessed for relevance. Interexaminer reliability of the relevance assessments was moderate [K(w) (standard error) = 0.46 (0.03)]. Intra-examiner reliability was fair for each of the assessors [K(w) (SE) = .36 (.10) and .35 (.10), respectively]. Of the 385 relevant citations, CHIROLARS retrieved 88 (relative recall = 23%) at a cost of CAN$1.01 per relevant citation, ICL retrieved 37 (relative recall = 10%) at CAN$.65 per relevant citation, and MEDLINE retrieved 260 (relative recall = 68%) at CAN$.52 per relevant citation.
MEDLINE was found to be the most efficient database to search for literature relevant to the chiropractor; it retrieved the highest proportion of relevant citations and was the least expensive. CHIROLARS was the second most efficient of the three databases. No single database can function as a stand-alone source of information. For comprehensive searching, having an experienced reference librarian search MEDLINE in combination with at least one other database is recommended.
确定三个计算机化文献数据库检索与脊椎按摩师相关文献的效率。
采用横断面设计。在脊椎按摩师文献数据库（CHIROLARS）、脊椎按摩文献索引（ICL）和医学文献数据库（MEDLINE）中检索1990 - 1992年关于脊柱侧弯、坐骨神经痛和颈部疼痛主题的英文文献引用。由两名评估人员根据相关性标准对文献引用进行评估；当两人对相关性都不确定时，由第三名评估人员进行评估。使用加权卡方统计量确定评估人员之间和评估人员内部相关性评估的可靠性。评估的结果包括检索时间、检索成本、文献引用数量、相关性、唯一文献引用数量以及来自同行评审期刊的文献引用数量。相对召回率和每条文献引用的成本被用作数据库效率的主要衡量指标。
共检索到846条文献引用。排除后，对786条文献引用进行了相关性评估。评估人员之间相关性评估的可靠性为中等[K(w)（标准误差）= 0.46（0.03）]。每位评估人员的评估人员内部可靠性一般[K(w)（标准误差）分别为0.36（0.10）和0.35（0.10）]。在385条相关文献引用中，CHIROLARS检索到88条（相对召回率 = 23%），每条相关文献引用成本为1.01加元；ICL检索到37条（相对召回率 = 10%），每条相关文献引用成本为0.65加元；MEDLINE检索到260条（相对召回率 = 68%），每条相关文献引用成本为0.52加元。
发现MEDLINE是检索与脊椎按摩师相关文献最有效的数据库；它检索到的相关文献引用比例最高且成本最低。CHIROLARS是这三个数据库中第二有效的。没有一个单一的数据库可以作为独立的信息来源。为了进行全面检索，建议由经验丰富的参考馆员结合至少一个其他数据库来检索MEDLINE。
