iCite Database Snapshot 2025-04

This is a database snapshot of the iCite web service (provided here as a single zipped CSV file, or compressed, tarred JSON files). In addition, citation links in the NIH Open Citation Collection are provided as a two-column CSV table in open_citation_collection.zip. iCite provides bibliometrics and metadata on publications indexed in PubMed, organized into three modules:<br>Influence: Delivers metrics of scientific influence, field-adjusted and benchmarked to NIH publications as the baseline.<br>Translation: Measures how Human, Animal, or Molecular/Cellular Biology-oriented each paper is; tracks and predicts citation by clinical articles<br>Open Cites: Disseminates link-level, public-domain citation data from the NIH Open Citation Collection<br>Definitions for individual data fields:<br>pmid: PubMed Identifier, an article ID as assigned in PubMed by the National Library of Medicine<br>doi: Digital Object Identifier, if available<br>year: Year the article was published<br>title: Title of the article<br>authors: List of author names<br>journal: Journal name (ISO abbreviation)<br>is_research_article: Flag indicating whether the Publication Type tags for this article are consistent with that of a primary research article<br>relative_citation_ratio: Relative Citation Ratio (RCR)--OPA's metric of scientific influence. Field-adjusted, time-adjusted and benchmarked against NIH-funded papers. The median RCR for NIH funded papers in any field is 1.0. An RCR of 2.0 means a paper is receiving twice as many citations per year than the median NIH funded paper in its field and year, while an RCR of 0.5 means that it is receiving half as many citations per year. Calculation details are documented in Hutchins et al., PLoS Biol. 2016;14(9):e1002541.<br>provisional: RCRs for papers published in the previous two years are flagged as "provisional", to reflect that citation metrics for newer articles are not necessarily as stable as they are for older articles. Provisional RCRs are provided for papers published previous year, if they have received with 5 citations or more, despite being, in many cases, less than a year old. All papers published the year before the previous year receive provisional RCRs. The current year is considered to be the NIH Fiscal Year which starts in October. For example, in July 2019 (NIH Fiscal Year 2019), papers from 2018 receive provisional RCRs if they have 5 citations or more, and all papers from 2017 receive provisional RCRs. In October 2019, at the start of NIH Fiscal Year 2020, papers from 2019 receive provisional RCRs if they have 5 citations or more and all papers from 2018 receive provisional RCRs.<br>citation_count: Number of unique articles that have cited this one<br>citations_per_year: Citations per year that this article has received since its publication. If this appeared as a preprint and a published article, the year from the published version is used as the primary publication date. This is the numerator for the Relative Citation Ratio.<br>field_citation_rate: Measure of the intrinsic citation rate of this paper's field, estimated using its co-citation network.<br>expected_citations_per_year: Citations per year that NIH-funded articles, with the same Field Citation Rate and published in the same year as this paper, receive. This is the denominator for the Relative Citation Ratio.<br>nih_percentile: Percentile rank of this paper's RCR compared to all NIH publications. For example, 95% indicates that this paper's RCR is higher than 95% of all NIH funded publications.<br>human: Fraction of MeSH terms that are in the Human category (out of this article's MeSH terms that fall into the Human, Animal, or Molecular/Cellular Biology categories)<br>animal: Fraction of MeSH terms that are in the Animal category (out of this article's MeSH terms that fall into the Human, Animal, or Molecular/Cellular Biology categories)<br>molecular_cellular: Fraction of MeSH terms that are in the Molecular/Cellular Biology category (out of this article's MeSH terms that fall into the Human, Animal, or Molecular/Cellular Biology categories)<br>x_coord: X coordinate of the article on the Triangle of Biomedicine<br>y_coord: Y Coordinate of the article on the Triangle of Biomedicine<br>is_clinical: Flag indicating that this paper meets the definition of a clinical article.<br>cited_by_clin: PMIDs of clinical articles that this article has been cited by.<br>apt: Approximate Potential to Translate is a machine learning-based estimate of the likelihood that this publication will be cited in later clinical trials or guidelines. Calculation details are documented in Hutchins et al., PLoS Biol. 2019;17(10):e3000416.<br>cited_by: PMIDs of articles that have cited this one.<br>references: PMIDs of articles in this article's reference list.<br>Large CSV files are zipped using zip version 4.5, which is more recent than the default unzip command line utility in some common Linux distributions. These files can be unzipped with tools that support version 4.5 or later such as 7zip.<br>Comments and questions can be addressed to [e-mail]本数据集为iCite网络服务的数据库快照（以单个压缩CSV文件或打包压缩的JSON文件形式提供）。此外，NIH开放引用集（NIH Open Citation Collection）中的引用链接以双栏CSV表格形式存放在open_citation_collection.zip中。 iCite可为PubMed收录的文献提供文献计量学指标与元数据，共分为三大模块： 1. 影响力（Influence）：提供经领域校正、以NIH资助文献为基准的科学影响力计量指标。 2. 转化性（Translation）：衡量每篇文献的研究导向——偏向人类、动物还是分子/细胞生物学；追踪并预测临床文献对其的引用情况。 3. 开放引用（Open Cites）：发布来自NIH开放引用集的链接级公共领域引用数据。 各数据字段定义如下： pmid：PubMed标识符（PubMed Identifier, PMID），即美国国家医学图书馆在PubMed中分配的文献唯一标识。 doi：数字对象标识符（Digital Object Identifier, DOI），若文献存在则提供该字段。 year：文献发表年份。 title：文献标题。 authors：作者姓名列表。 journal：期刊名称（采用ISO缩写格式）。 is_research_article：标记字段，用于指示该文献的出版物类型标签是否符合原创研究文章的标准。 relative_citation_ratio：相对引用比（Relative Citation Ratio, RCR）——美国国立卫生研究院项目分析办公室（Office of Portfolio Analysis, OPA）的科学影响力计量指标。该指标经领域与时间校正，并以NIH资助文献为基准。任意领域内NIH资助文献的RCR中位数为1.0：若RCR为2.0，则表示该文献每年每篇的引用量是其所属领域、同发表年份NIH资助文献中位数的两倍；若RCR为0.5，则仅为该中位数的一半。其计算方法详见Hutchins等发表于PLoS Biol. 2016;14(9):e1002541的研究。 provisional：近两年发表的文献的RCR会标记为「暂定」，以反映较新文献的引用计量指标稳定性不及旧文献。若近一年发表的文献获得5次及以上引用（即便其发表时长不足一年），也会提供暂定RCR；前一年发表的所有文献均会提供暂定RCR。当前年度以美国国立卫生研究院财年为准，该财年始于每年10月。例如，在2019年7月（NIH 2019财年），2018年发表且获得5次及以上引用的文献，以及2017年发表的所有文献，均会提供暂定RCR；2019年10月，即NIH 2020财年开始时，2019年发表且获得5次及以上引用的文献，以及2018年发表的所有文献，均会提供暂定RCR。 citation_count：引用该文献的唯一文献总量。 citations_per_year：该文献自发表以来每年平均获得的引用量。若该文献同时以预印本和正式出版物形式发布，则以正式出版物的发表年份作为主要出版日期。该指标为相对引用比的分子项。 field_citation_rate：该文献所属领域的固有引用率，通过其共引网络估算得出。 expected_citations_per_year：与该文献具有相同领域引用率、且发表年份相同的NIH资助文献每年平均获得的引用量。该指标为相对引用比的分母项。 nih_percentile：该文献的RCR在所有NIH资助文献中的百分位排名。例如，95%表示该文献的RCR高于95%的NIH资助文献。 human：属于人类（Human）类别的医学主题词（MeSH terms）占该文献所有归入人类、动物或分子/细胞生物学类别的医学主题词的比例。 animal：属于动物（Animal）类别的医学主题词占该文献所有归入上述三类主题词的比例。 molecular_cellular：属于分子/细胞生物学（Molecular/Cellular Biology）类别的医学主题词占该文献所有归入上述三类主题词的比例。 x_coord：该文献在生物医学三角（Triangle of Biomedicine）中的X轴坐标。 y_coord：该文献在生物医学三角中的Y轴坐标。 is_clinical：标记字段，用于指示该文献符合临床文章的定义。 cited_by_clin：引用该文献的临床文章的PubMed标识符列表。 apt：近似转化潜力（Approximate Potential to Translate, APT）是基于机器学习的评估指标，用于估算该文献在后续临床试验或指南中被引用的可能性。其计算方法详见Hutchins等发表于PLoS Biol. 2019;17(10):e3000416的研究。 cited_by：引用该文献的所有文章的PubMed标识符列表。 references：该文献参考文献列表中收录的文章的PubMed标识符列表。 本数据集的大型CSV文件采用zip 4.5版本进行压缩，该版本较部分主流Linux发行版默认的unzip命令行工具更新。可使用支持zip 4.5及以上版本的工具（如7zip）对其进行解压。 如有疑问或建议，请联系邮箱[e-mail]