Maroufi S Farzad, Maroufi S Parmis, Fallahi Mohammad Sadegh, Sheehan Jason P
Neurosurgical Research Network (NRN), Universal Scientific Education and Research Network (USERN), Tehran University of Medical Sciences, Tehran, Iran.
Department of Neurosurgery, Tehran University of Medical Sciences, Tehran, Iran.
J Neurooncol. 2025 Jan;171(2):329-341. doi: 10.1007/s11060-024-04869-y. Epub 2024 Oct 30.
The Journal of Neuro-Oncology (JNO), established in 1983, plays a key role in publishing research on brain and spinal cord tumors. This study examines JNO's publication trends, focusing on country and gender representation to highlight its global impact.
Statistical analyses were conducted using R. Gender of the first authors was predicted using a gender-guesser, and author affiliations were used to determine publication countries. We introduced a novel Country-Related Diversity (CRD) index to assess the JNO's representativeness, comparing a country's JNO publications to its overall neurosurgical output. An index value of 1 indicates proportional representation.
The JNO corpus, spanning from 1983 to 2024, comprises 8,154 documents with an average document age of 14.4 years. The average citation count per document is 28.71, with a rate of 2.16 citations per document per year. JNO's scientific output has grown significantly, peaking at 397 articles in 2011, with a long-term annual growth rate of 3.7%. The keyword analysis highlights "glioblastoma" as the most frequent term, reflecting the journal's neuro-oncological focus. Geographically, the U.S. led with 2,535 articles (40.1%), followed by China and Germany. International collaboration rose steadily, with multi-country publications increasing from 4.76% in 1983 to 20.98% in 2024. Analyzing contributions from different countries showed a converging CRD index toward 1 (P < 0.01), with U.S. and non-U.S. countries trending similarly. Upper-middle-income countries displayed fluctuating CRD patterns, whereas lower-middle-income countries lagged behind. Authorship analysis showed an increasing trend in co-authorship (P < 0.01), with the average number of authors per paper reaching 10.4 by 2024. Gender representation revealed a growing number of female first and senior authors, although males still dominate. By 2024, 32.9% of first authors and 21.6% of senior authors were female, signaling a gradual trend toward gender parity (P < 0.01).
The CRD index offers a standardized measure of country-specific research representation in the JNO. The convergence towards 1 reflects balanced international representation. JNO publication also reflects a trend toward gender equity, with a notable rise in female first authors, enhancing global research inclusivity.
《神经肿瘤学杂志》（JNO）创刊于1983年，在发表关于脑和脊髓肿瘤的研究方面发挥着关键作用。本研究考察了JNO的出版趋势，重点关注国家和性别代表性，以突出其全球影响力。
使用R进行统计分析。使用性别猜测工具预测第一作者的性别，并利用作者所属机构确定出版国家。我们引入了一个新的国家相关多样性（CRD）指数来评估JNO的代表性，将一个国家在JNO上的出版物与其整体神经外科产出进行比较。指数值为1表示比例代表性。
JNO的文献库涵盖1983年至2024年，包括8154篇文献，平均文献年龄为14.4年。每篇文献的平均被引次数为28.71次，每年每篇文献的被引率为2.16次。JNO的科研产出显著增长，在2011年达到397篇文章的峰值，长期年增长率为3.7%。关键词分析突出显示“胶质母细胞瘤”是最频繁出现的术语，反映了该期刊对神经肿瘤学的关注重点。在地理方面，美国以2535篇文章领先（占40.1%），其次是中国和德国。国际合作稳步上升，多国合作发表的文章从1983年的4.76%增加到2024年的20.98%。对不同国家贡献的分析显示，CRD指数向1收敛（P < 0.01），美国和非美国国家的趋势相似。中高收入国家的CRD模式波动，而中低收入国家则滞后。作者分析显示共同作者数量呈上升趋势（P < 0.01），到2024年每篇论文的平均作者数量达到10.4人。性别代表性显示，虽然男性仍然占主导地位，但女性第一作者和资深作者的数量在增加。到2024年，32.9%的第一作者和21.6%的资深作者为女性，这表明朝着性别平等的趋势逐渐显现（P < 0.01）。
CRD指数为JNO中特定国家研究代表性提供了一种标准化衡量方法。向1的收敛反映了国际代表性的平衡。JNO的出版也反映了性别平等的趋势，女性第一作者显著增加，增强了全球研究的包容性。
