Garfield E
Ann Intern Med. 1986 Aug;105(2):313-20. doi: 10.7326/0003-4819-105-2-313.
High-impact medical journals are identified using data from the 1981 and 1982 Journal Citation Reports. The Journal Citation Reports are an annual supplement to the Science Citation Index. Journals publish different types of editorial matter, much of which does not report substantive research. A special algorithm is used to calculate the number of substantial or "meaty" items. In 1981 The Lancet and The New England Journal of Medicine ranked highest among 78 journals in citations received; 53,945 and 47,887, respectively. These journals also have the highest impact factor, the average number of citations received by items in a journal's 1980 and 1981 issues. The British Medical Journal was highest in 1981 immediacy index, the measure of how quickly a journal's 1981 items were cited in 1981.
高影响力医学期刊是利用1981年和1982年《期刊引证报告》的数据来确定的。《期刊引证报告》是《科学引文索引》的年度增刊。期刊发表不同类型的编辑内容，其中大部分并未报道实质性研究。一种特殊算法用于计算实质性或“有价值”文章的数量。1981年，《柳叶刀》和《新英格兰医学杂志》在78种期刊中获得的引用排名最高，分别为53945次和47887次。这些期刊的影响因子也最高，即某期刊1980年和1981年发表文章的平均被引用次数。《英国医学杂志》在1981年即时指数方面排名最高，即时指数衡量的是某期刊1981年发表的文章在1981年被引用的速度。
