Abstract: Objective: To analyze the status and category characteristics of evidence-informed decision-making competence among nurses in tertiary grade A hospitals, and explore its influencing factors, so as to provide a reference for improving nurses' evidence-informed decision-making competence. Methods: Using convenience sampling, a questionnaire survey was conducted on 1403 nurses from 5 tertiary grade A hospitals in Shandong province from March to April 2025. The General Information Questionnaire, the Evidence-Informed Decision-Making competence measure for nurses, the Reflective Practice Questionnaire and the Nursing Research Self-Efficacy Scale were used to investigate. Latent profile analysis was adopted to establish a latent category model, and unordered multinomial Logistic regression was used to identify the influencing factors of nurses' evidence-informed decision-making competence in different profile categories. Results: The score for nurses' evidence-informed decision-making competence was 112.77±17.12. Nurses' evidence-informed decision-making competence could be divided into 3 latent profiles: budding type (20.0%), growing type (52.2%), and integrated practice type (27.8%). Unordered multinomial Logistic regression analysis results showed that education level, years of service, number of academic lectures or conferences attended annually, reflective practice level and nursing research self-efficacy were the influencing factors of nurses' evidence-informed decision-making competence (all P<0.05). Conclusion: The evidence-informed decision-making competence of nurses is at moderately high level with heterogeneity. Nursing managers should intervene and support nurses based on the influencing factors of different latent profiles, so as to improve their evidence-informed decision-making competence.

Key words: nurse; evidence-informed decision-making competence; latent profile analysis; influencing factor