iCite Database Snapshot (Initial)

This is a database snapshot of the iCite web service (provided here as a single zipped CSV file, or sliced into 30 smaller, numbered CSV files, or compressed, tarred JSON files). iCite provides bibliometrics and metadata on publications indexed in PubMed, organized into three modules: Influence: Delivers metrics of scientific influence, field-adjusted and benchmarked to NIH publications as the baseline. Translation: Measures how Human, Animal, or Molecular/Cellular Biology-oriented each paper is; tracks and predicts citation by clinical articles Open Cites: Disseminates link-level, public-domain citation data from the NIH Open Citation Collection Definitions for individual data fields: pmid: PubMed Identifier, an article ID as assigned in PubMed by the National Library of Medicine doi: Digital Object Identifier, if available year: Year the article was published title: Title of the article authors: List of author names journal: Journal name (ISO abbreviation) is_research_article: Flag indicating whether the Publication Type tags for this article are consistent with that of a primary research article 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. 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. citation_count: Number of unique articles that have cited this one 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. field_citation_rate: Measure of the intrinsic citation rate of this paper's field, estimated using its co-citation network. 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. 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. 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) 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) 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) x_coord: X coordinate of the article on the Triangle of Biomedicine y_coord: Y Coordinate of the article on the Triangle of Biomedicine is_clinical: Flag indicating that this paper meets the definition of a clinical article. cited_by_clin: PMIDs of clinical articles that this article has been cited by. 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. cited_by: PMIDs of articles that have cited this one. references: PMIDs of articles in this article's reference list. 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. 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，提供形式包含三种：单个压缩ZIP格式CSV文件、拆分为30个带编号的小型CSV文件，或压缩打包的JSON文件。iCite可为PubMed收录的出版物提供文献计量学与元数据服务，下设三个功能模块： 1. 影响力模块：提供经领域校正、以美国国立卫生研究院（National Institutes of Health, NIH）出版物为基准的科学影响力计量指标。 2. 转化力模块：评估每篇论文的研究方向归属人类医学、动物实验或分子/细胞生物学范畴；追踪并预测临床文章对该论文的引用情况。 3. 开放引用模块：发布源自NIH开放引用集合的链路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）：美国国家医学图书馆在PubMed中分配的文章唯一标识。 - doi（数字对象标识符, Digital Object Identifier）：若可用则提供该字段。 - year：论文发表年份。 - title：论文标题。 - authors：作者姓名列表。 - journal：期刊名称（采用ISO缩写格式）。 - is_research_article：研究文章标记：用于标识该文章的出版物类型标签是否符合原创研究文章的范畴。 - relative_citation_ratio（相对引用比率, Relative Citation Ratio, RCR）：美国国立卫生研究院办公室（Office of Public Affairs, OPA）提出的科学影响力计量指标。该指标经领域与时序双重校正，以NIH资助论文为基准。任一领域内NIH资助论文的RCR中位数为1.0：RCR为2.0意味着该论文每年每篇的被引频次是其所属领域同年度NIH资助论文中位数的2倍；而RCR为0.5则表示其年均被引频次仅为对应中位数的一半。具体计算方法详见Hutchins等人发表于*PLoS Biol.* 2016;14(9):e1002541的研究论文。 - provisional（临时RCR标记）：近两年发表的论文的RCR会被标记为“临时”，以反映新发表文章的引用计量指标稳定性不及旧文章。若近前一年发表的论文获得至少5次引用，即便其发表时长不足一年，也会提供临时RCR；近前两年发表的所有论文均会被赋予临时RCR。当前年度以NIH财年（始于每年10月）为准。例如，2019年7月（NIH 2019财年）时，2018年发表且被引≥5次的论文以及2017年发表的所有论文均会被标记为临时RCR；2019年10月NIH 2020财年启动后，2019年发表且被引≥5次的论文以及2018年发表的所有论文将被标记为临时RCR。 - citation_count（总被引次数）：引用该论文的唯一文章总数。 - citations_per_year（年均被引次数）：该论文自发表以来的年均被引频次。若该论文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率的分子。 - field_citation_rate（领域固有引用率）：基于论文的共引网络估算得到的该论文所属领域的固有引用率。 - expected_citations_per_year（预期年均被引次数）：与该论文具有相同领域固有引用率且发表于同一年度的NIH资助论文的年均被引频次，为相对引用比率的分母。 - nih_percentile（NIH百分位排名）：该论文的RCR在所有NIH资助论文中的百分位排名。例如，95%表示该论文的RCR高于95%的NIH资助论文。 - human（人类医学占比）：该论文的医学主题词（Medical Subject Headings, MeSH）中属于人类医学类别的占比（仅统计归入人类医学、动物实验、分子/细胞生物学类别的MeSH词）。 - animal（动物实验占比）：该论文的MeSH词中属于动物实验类别的占比（统计范围同上）。 - molecular_cellular（分子/细胞生物学占比）：该论文的MeSH词中属于分子/细胞生物学类别的占比（统计范围同上）。 - x_coord、y_coord（生物医学三角图坐标）：该论文在生物医学三角图上的横、纵坐标。 - is_clinical（临床文章标记）：标识该论文符合临床文章的定义范畴。 - cited_by_clin（临床引用论文PMID列表）：引用该论文的临床文章的PMID集合。 - apt（转化潜力近似值, Approximate Potential to Translate）：基于机器学习算法估算的该论文在后续临床试验或临床指南中被引用的可能性。 - cited_by（引用论文PMID列表）：引用该论文的所有文章的PMID集合。 - references（参考文献PMID列表）：该论文参考文献列表中收录的文章PMID。 大型CSV文件采用ZIP 4.5版本压缩，其版本高于部分主流Linux发行版默认的命令行unzip工具，需使用支持ZIP 4.5及以上版本的解压工具（如7zip）完成解压。如有疑问或建议，请发送邮件至[e-mail]。