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Bibliometric Study of Obstetrics Articles Published in the Journal of the American Medical Association 1997-2016

机译：1997-2016年发表在美国医学会杂志上的妇产科文章的文献计量研究

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IntroductionA recent increase in cases of advanced maternal age in the US has been partly associated with a higher incidence of pregnancy-related complications and infertility. However, little is known on how such social changes may have influenced obstetrics articles published in high-impact medical journals subscribed by diverse physicians. The objective of this study is to elucidate the presence and trend of obstetrics investigations in high-profile medical journals.Material and methodsThis bibliometric study retrospectively analyzed original articles published in the Journal of the American Medical Association (JAMA) from 1997 to 2016. Two reviewers extracted obstetrics articles from PubMed, assessed whether to include specific articles, and categorized them by subtopic. Main outcomes measure was the annual number of original investigations in obstetrics divided by that of original investigations from all fields during the study period, expressed as a trend.ResultsA total of 3486 original investigations were published during the study period. Regarding obstetrics, 1989 articles were originally extracted from PubMed; after a two-step review process, 199 (10.0%) obstetrics-related original investigations remained. Among them, 134 (67.4%) were classified as pregnancy-related abnormalities or complications (non-infection). The proportion of obstetrics articles decreased during the first 10 years but increased in the last 10 years. The highest figures in the first 10 and last 10 years were 8.5% in 1999 and 9.4% in 2014, respectively, whereas the lowest was 1.4% in 2008. The proportion articles on pregnancy-associated complications or abnormalities (non-infection) steadily increased during the study period, that of articles on infertility increased, and that of articles on human immunodeficiency virus (HIV) infection steadily decreased.ConclusionsThe observed trend may suggest a changing interest in obstetrics investigations among general physicians in the last 20 years. What is particularly notable is a heightened presence of research on pregnancy-related complications and infertility, which may reflect an increasing frequency in advanced maternal age in the US.
机译：引言最近美国孕产妇高龄病例的增加部分与妊娠相关并发症和不孕症的高发有关。然而，关于这种社会变化如何影响各行各业订阅的高影响力医学期刊上的产科文章知之甚少。这项研究的目的是阐明知名医学期刊中的产科研究的存在和趋势。材料与方法本文献计量研究回顾性分析了1997年至2016年发表在《美国医学会杂志》（JAMA）上的原始文章。两位审稿人从PubMed中提取产科文章，评估是否包括特定文章，并按子主题将其分类。主要结局指标是研究期间每年的产科原始检查次数除以各领域原始检查的次数，并以趋势表示。结果研究期间共发表了3486项原始检查。关于产科，1989年的文章最初摘自PubMed；经过两步审查过程，剩下199项（10.0％）与产科相关的原始调查仍然存在。其中，有134例（67.4％）被归类为与怀孕有关的异常或并发症（非感染）。产科物品的比例在前10年下降，但在最近10年上升。前10年和后10年的最高数字分别是1999年的8.5％和2014年的9.4％，而最低的是2008年的1.4％。与妊娠相关的并发症或异常（非感染）的文章比例稳步上升在研究期间，关于不育症的文章增加，关于人类免疫缺陷病毒（HIV）感染的文章稳定减少。结论观察到的趋势可能表明近20年来普通医师对产科研究的兴趣正在改变。特别值得注意的是，与妊娠相关的并发症和不育症的研究越来越多，这可能反映出美国高龄产妇的频率越来越高。

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