Influence of English language in the number of citations of articles published in Brazilian journals of Ophthalmology

Abstract

Purpose: To determine the association between language and number of citations of ophthalmology articles published in Brazilian journals. Methods: This study was a systematic review. Original articles were identifiedby review of documents published at the two Brazilian ophthalmology journalsindexed at Science Citation Index Expanded - SCIE ["Arquivos Brasileiros de Oftalmologia(ABO)" and "Revista Brasileira de Oftalmologia (RBO)"]. All document types("articles" and "reviews") listed at SCIE in English (English Group) or in Portuguese(Portuguese Group) from January 1, 2008 to December 31, 2009 were included, except: "editorial materials"; "corrections"; "letters"; and "biographical items". Theprimary outcome was the number of citations through the end of second yearafter publication date. Subgroup analysis included likelihood of citation (cited atleast once versus no citation), journal, and year of publication. Results: The search at the web of science revealed 382 articles [107 (28%) in theEnglish Group and 275 (72%) in the Portuguese Group]. Of those, 297 (77.7%)werepublished at the ABO and 85 (23.3%) at the RBO. The citation counts werestatistically significantly higher (P <0.001) in the English Group (1.51-SD 1.98-range 0 to 11) compared with the Portuguese Group (0.57-SD 1.06-range 0 to 7).The likelihood citation was statistically significant higher (P < 0.001) in the EnglishGroup (70/107-65.4%) compared with the Portuguese Group (89/275-32.7%).There were more articles published in English at the ABO (98/297-32.9%) than atthe RBO (9/85-10.6%) [P <0.001]. There were no significant difference (P=0.967) atthe proportion of articles published in English at the years 2008 (48/172-27.9%)and 2009 (59/210-28.1%).Conclusion: The number of citations of articles published in Portuguese at Brazilianophthalmology journals is lower than the published in English. The results of thisstudy suggest that the editorial boards should strongly encourage the authorsto adopt English as the main language in their future articles.