Aim: This study aimed to explore sociodemographic factors related to evidence-based practice (EBP) competency in Japanese nurses in university hospitals. Methods: In March 2016, a survey was distributed to 843 clinical nurses who directly provide nursing care at two university hospitals in Japan. Multiple regression analyses were conducted on data received from 472 nurses using the Evidence-Based Practice Questionnaire (Japanese version). Results: Sociodemographic factors related to EBP competency were experience with conducting nursing research as a part of continuing education, education about EBP, advanced practice certification (certified nurse specialists/certified nurses), and years of experience in clinical nursing. These factors differed across the four subscales of the questionnaire: Practice, Attitude, Knowledge of Research and Practice, and Skills of Research and Practice. Specifically, experience with two or more nursing research activities was significantly positively associated with Attitude and Knowledge/Skills Concerning Research and Practice of EBP, but not related to the implementation of EBP itself. Advanced practice certification was significantly positively associated with Practice and Attitude of EBP. Conclusions: Our study quantitatively identified sociodemographic factors including experience with conducting nursing research and advanced practice certification status that were found to be related to EBP competency and these factors were differently associated with the four subscales of the Evidence-Based Practice Questionnaire (Japanese version). EBP education should depend on nurses' levels of EBP competency, and nursing educators and managers need to be cognizant of their nurses' sociodemographic factors when providing EBP education.
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