Brüggmann Dörthe, Kollascheck Jana, Quarcoo David, Bendels Michael H, Klingelhöfer Doris, Louwen Frank, Jaque Jenny M, Groneberg David A
Department of Obstetrics and Gynecology, Keck School of Medicine of USC, Los Angeles, California, USA.
Division of Female Health and Preventive Medicine, Institute of Occupational Medicine, Social Medicine and Environmental Medicine, Goethe-University, Frankfurt.
BMJ Open. 2017 Oct 11;7(10):e018394. doi: 10.1136/bmjopen-2017-018394.
About 2% of all pregnancies are complicated by the implantation of the zygote outside the uterine cavity and termed ectopic pregnancy. Whereas a multitude of guidelines exists and related research is constantly growing, no thorough assessment of the global research architecture has been performed yet. Hence, we aim to assess the associated scientific activities in relation to geographical and chronological developments, existing research networks and socioeconomic parameters.
Retrospective, descriptive study.
On the basis of the NewQIS platform, scientometric methods were combined with novel visualising techniques such as density-equalising mapping to assess the scientific output on ectopic pregnancy. Using the Web of Science, we identified all related entries from 1900 to 2012.
8040 publications were analysed. The USA and the UK were dominating the field in regard to overall research activity (2612 and 723 publications), overall citation numbers and country-specific H-Indices (US: 80, UK: 42). Comparison to economic power of the most productive countries demonstrated that Israel invested more resources in ectopic pregnancy-related research than other nations (853.41 ectopic pregnancy-specific publications per 1000 billlion US$ gross domestic product (GDP)), followed by the UK (269.97). Relation to the GDP per capita index revealed 49.3 ectopic pregnancy-specific publications per US$1000 GDP per capita for the USA in contrast to 17.31 for the UK. Semiqualitative indices such as country-specific citation rates ranked Switzerland first (24.7 citations per ectopic pregnancy-specific publication), followed by the Scandinavian countries Finland and Sweden. Low-income countries did not exhibit significant research activities.
This is the first in-depth analysis of global ectopic pregnancy research since 1900. It offers unique insights into the global scientific landscape. Besides the USA and the UK, Scandinavian countries and Switzerland can also be regarded as leading nations with regard to their relative socioeconomic input.
约2%的妊娠会因受精卵在子宫腔外着床而并发异位妊娠。尽管存在大量指南且相关研究不断增加，但尚未对全球研究架构进行全面评估。因此，我们旨在评估与地理和时间发展、现有研究网络及社会经济参数相关的科学活动。
回顾性描述性研究。
基于NewQIS平台，将科学计量方法与密度均衡映射等新型可视化技术相结合，以评估异位妊娠的科学产出。利用科学网，我们确定了1900年至2012年期间所有相关条目。
分析了8040篇出版物。就总体研究活动（分别为2612篇和723篇出版物）、总被引次数和特定国家的H指数而言，美国和英国在该领域占据主导地位（美国：80，英国：42）。与最具生产力国家的经济实力相比，以色列在异位妊娠相关研究上投入的资源比其他国家更多（每10000亿美元国内生产总值（GDP）有853.41篇异位妊娠特定出版物），其次是英国（269.97）。与人均GDP指数的关系显示，美国每1000美元人均GDP有49.3篇异位妊娠特定出版物，而英国为17.31篇。诸如特定国家被引率等半定性指数中，瑞士排名第一（每篇异位妊娠特定出版物被引24.7次），其次是斯堪的纳维亚国家芬兰和瑞典。低收入国家未表现出显著的研究活动。
这是自1900年以来对全球异位妊娠研究的首次深入分析。它为全球科学格局提供了独特见解。除美国和英国外，斯堪的纳维亚国家和瑞士在相对社会经济投入方面也可被视为领先国家。
