Assessment tools for evaluating stress experienced by undergraduate nursing interns during clinical training in China remain limited. Existing scales often fail to capture the specific stressors unique to clinical practice. This study aimed to explore the structure of the Chinese-adapted Student Nurse Stressor-14 Scale (SNS-14-CHI) and to assess its reliability and validity among Chinese undergraduate nursing interns. The original SNS-14 was adapted to the Chinese context and refined based on expert review. A total of 414 nursing interns from three cities in China completed the questionnaire. Reliability was assessed through internal consistency, split-half reliability, and test-retest stability. Construct validity was evaluated using both exploratory and confirmatory factor analyses. All 14 items were retained in the SNS-14-CHI. Exploratory factor analysis identified a two-factor structure, with some differences in item loadings compared to the original scale. Confirmatory factor analysis indicated a good fit of the model. The overall Cronbach’s alpha was 0.934, with the two factors showing coefficients of 0.890 and 0.898. The content validity index reached 0.964, and the two-factor solution accounted for 60.45% of the total variance. Split-half reliability and test-retest stability were 0.869 and 0.762, respectively. The SNS-14-CHI is a reliable and valid instrument for assessing stressors among undergraduate nursing interns. Its application can guide nursing educators and administrators in identifying stress sources and designing interventions or educational programs to support nursing students during clinical practice.
