Aims:The aim of the present study was to develop a tool, the Psychiatric Nurse Job Stressor Scale (PNJSS), for measuring the stress of psychiatric nurses, and to evaluate the reliability and validity of the PNJSS.Methods: A total of 302 psychiatric nurses completed all the questions in an early version of the PNJSS, which was composed of 63 items and is based on past literature of psychiatric nurses' stress.Results: A total of 22 items from four factors, 'Psychiatric Nursing Ability', 'Attitude of Patients', 'Attitude Toward Nursing' and 'Communication', were extracted in exploratory factor analysis. With regard to scale reliability, the item-scale correlation coefficient was r = 0.265-0.570 (P < 0.01), the Cronbach alpha coefficient was 0.675-0.869, and the test-retest correlation coefficient was r = 0.439-0.771 (P < 0.01). With regard to scale validity, the convergent validity of the 'job stressor' scale was r = 0.172-0.420 (P < 0.01), and the predictive validity of the 'job reaction' scale was r = 0.201-0.453 (P < 0.01). The compatibility of the factor model to the data was 1.750 (c 2 /d.f., 343.189/196, P < 0.01), the goodness of fit index was 0.910, the adjusted goodness of fit index was 0.883, the comparative fit index was 0.924, and the root mean square error of approximation was 0.050. Conclusions:The PNJSS has sufficient reliability and validity as a four-factor structure containing 22 items, and is valid as a tool for evaluating psychiatric nurse job stressors.

In psychiatric nursing, female nurses tend to spend more time building rapport with patients and developing cooperative working relationships with colleagues; they encounter more sexual harassment by patients. In contrast, male nurses respond to aggressive patients and tend to resist physically caring for female patients; they encounter more physical and verbal assault from patients. These gender differences might result in differences in job-related stress. We quantitatively examined gender differences in psychiatric nurses' job stress. The Psychiatric Nurse Job Stressor Scale and the Stress Reaction Scale of the Brief Job Stress Questionnaire were administered to 159 female and 85 male Japanese psychiatric nurses. The results indicated that female nurses had significantly higher stress levels than males related to psychiatric nursing ability, attitude towards nursing, and stress reactions of fatigue and anxiety. Moreover, the factors affecting stress reactions differed somewhat between sexes. In particular, male nurses reported that greater irritability was affected by patients' attitudes. Their anxiety and somatic symptoms were affected by their attitude towards nursing, and depressed mood was affected by psychiatric nursing ability. Knowledge of these differences can lead to better mental health-care interventions for psychiatric nurses.

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