General Practice Ward/International Medical Center Ward, General Practice Medical Center and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China.
Department of Periodical Press and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China.
Syst Rev. 2023 Jul 14;12(1):120. doi: 10.1186/s13643-023-02270-w.
To evaluate the number of citations for Cochrane Methodology Reviews after they have been updated or co-published in another journal, and the effect of co-publishing the review on the co-publishing journal's impact factor (IF).
We identified all Cochrane Methodology Reviews published in the Cochrane Database of Systematic Reviews (CDSR) before 2018 and searched for co-published versions in the Web of Science Core Collection database up to 16 August 2022. The included reviews were in two cohorts: those that had been published and updated in CDSR and those that had been published in CDSR and co-published in another journal. The primary outcome measured the citation number to updated and original reviews in the first five years after publication of the updated review, and assessed the citation number of co-published and non-co-published reviews in the first five years after publication of the co-published version. The secondary outcome was the ratio of an adjusted IF and the actual IF of the co-publishing journal.
Eight updated and six original reviews were identified for the updated cohort of reviews, and four co-published reviews were included in the co-published cohort. The original reviews continued to be cited after the update was published but the median for the total number of citations was non-significantly higher for the updated reviews than for their original version[161 (Interquartile range (IQR) 85, 198) versus 113 (IQR 15, 433)]. The median number of total citations [362 (IQR 179, 840) versus 145 (IQR 75, 445)] and the median number of citations to the review in the first five years after co-publication combined and in each of those years was higher in the co-published group than in the non-co-published group. One of the three journals that co-published Reviews in the first year and two journals in the second year had a lower IF after co-publication.
Earlier versions of Cochrane Methodology Reviews continue to be cited after an update is published, which raises doubts about whether those citing are using the most recent evidence or are aware of the update. Co-publication facilitates broader application and dissemination of Cochrane methodology evidence.
评估 Cochrane 方法学评价在更新或在另一本期刊共同发表后的被引频次，以及共同发表对共同发表期刊影响因子（IF）的影响。
我们确定了 2018 年前在 Cochrane 系统评价数据库（CDSR）中发表的所有 Cochrane 方法学评价，并在 2022 年 8 月 16 日之前在 Web of Science 核心合集数据库中搜索共同发表的版本。纳入的评价分为两组：已在 CDSR 中发表和更新的评价，以及已在 CDSR 中发表和在另一本期刊中共同发表的评价。主要结局是评估更新后五年内更新和原始评价的被引频次，以及评估共同发表五年内共同发表和非共同发表评价的被引频次。次要结局是调整后的 IF 与共同发表期刊实际 IF 的比值。
确定了更新组的 8 篇更新评价和 6 篇原始评价，共同发表组包括 4 篇共同发表评价。原始评价在更新后仍被引用，但更新评价的总被引频次中位数显著高于原始版本[161（四分位距（IQR）85，198）比 113（IQR 15，433）]。总被引频次的中位数[362（IQR 179，840）比 145（IQR 75，445）]和共同发表后五年内以及每年的评价被引频次中位数在共同发表组更高。在共同发表的第一年有三本期刊中的一本和第二年有两本期刊的 IF 降低。
更新后，早期版本的 Cochrane 方法学评价仍被引用，这让人怀疑引用者是否使用了最新的证据，或者是否知道更新。共同发表有助于更广泛地应用和传播 Cochrane 方法学证据。
