學術研究機構評估個人研究成果，圖書館選購期刊，多會利用期刊引用報告(Journal Citation Reports-JCR)的引用數據做為評鑑的準則。本研究旨在探討JCR中一般內科醫學及外科醫學各種期刊之引用數據，分析各數值所代表的意義，並利用皮爾森積差相關係數比較其間的相互關係，以深入了解二主題期刊之特性與引用數據的意義。研究結果發現，二學科期刊數據的分佈情形雖大致相同，但因學科的差異故亦呈現出不同特性；在相關分析中，二學科期刊刊載文章篇數、期刊被引用次數、影響係數與即時引用指數間具有較高度的正相關，整體而言，上述變項彼此之相關性，一般內科醫學比外科醫學來得顯著。 The purpose of this study is to analyze and compare journal citation data, from Journal Citation Reports on the Web 2000, of general internal medicine and surgical medicine. The distributions of six kinds of citation data, i.e. source items, citation frequency, impact factor, immediacy index, citing half-life and cited half-life are given and discussed in detail. The correlation between each pair of citation data, for example source items and citation frequency, is determined based on the Pearson correlation tests. The following results of this work reveal: the frequently published journals are cited more frequently and also with high impact factor and immediacy index, in addition, they are usually accompanied with short citing half-life (usually cite current literature). The impact factor and immediacy index has significant correlation with citation frequency. A significant correlation also exists between impact factor and immediacy index. However there is no correlation between cited half-life and other citation data, except citation frequency and citing half-life.