Purpose
This study aimed to develop a colleague solidarity scale for nurses and to verify its validity and reliability.
Methods
Initial items were extracted through an extensive literature review and in-depth interviews with twelve clinical nurses. These items were subjected to content validity testing by ten experts and face validity testing by five nurses. Subsequently, the final tool was developed using a validity and reliability test comprising 53 preliminary items. Survey data were collected from 548 hospital nurses.
Results
In the exploratory factor analysis, four factors and 33 items were selected, yielding a total cumulative variance ratio of 66.7%. Through the confirmatory factor analysis, the final tool consisting of 4 factors and 31 items was developed. The factors were as follows: “mutually beneficial community,” “nurse identity.” “rigid organizational experience,” and “supportive interaction.” These factors were verified through convergent and discriminant validity testing. The internal consistency reliability was acceptable (Cronbach’s ⍺= .94).
Conclusion
This tool can serve as the basis for developing programs and strategies to strengthen solidarity among nurses by identifying the current level of colleague solidarity among hospital nurses and enhancing their understanding of it.

Purpose
The purpose of this study was to develop and validate the Job Competency Scale (JCS) for insurance review nurses working in hospitals.
Methods
The initial items were generated through a literature review and interviews with 10 experts. The content validity of the items was evaluated through content validity and face validity tests. Data from 301 insurance review nurses working in hospitals were analyzed using item analysis, exploratory and confirmatory factor analysis, and convergent validity; reliability was tested using Cronbach’s ⍺.
Results
The final JCS consisted of 25 items and five factors (knowledge integration, professional ethics, communication and interpersonal relationship, information literacy and problem solving, self-development) that explained 72.4% of the variance. Confirmatory factor analysis indicated that the theoretical model comprising 25 items satisfied all goodness-of-fit parameters. Convergent validity was confirmed by the Task Performance Scale for insurance review nurses (r=.53, p<.001). The total Cronbach’s ⍺ score for scale was .94.
Conclusion
The JCS was found to be a reliable and valid instrument that can be used to measure the job competency of insurance review nurses working in hospitals.