Participants
This cross-sectional study was conducted in the First Affiliated Hospital of Xinxiang Medical College in Henan province using convenience sampling in July 2021. The participants were those who were currently performing the nursing job during the study and possessed a nurse qualification certificate. Moreover, we excluded other medical professionals, such as doctors. A total of 1,700 nurses completed a questionnaire survey. Finally, we excluded 131 entries on account of missing data, leaving 1,569 nurses in the sample.
Measurements
Assessment of psychological flexibility
The most prominent aspects (cognitive diffusion and experiential avoidance) were used to evaluate the negative features of psychological flexibility (22){Yasinski, 2020 #16}. The Cognitive Fusion Questionnaire (CFQ) and the Acceptance and Action Questionnaire version 2 (AAQ-II) were administered to all the participants. The higher the scores on these scales, the lower the level of psychological flexibility, thereby suggesting psychological inflexibility.
Cognitive Fusion Questionnaire
The Chinese version of the CFQ (23) was used in this study, which was originally compiled by Gillanders et al (24). It comprises nine questions with a range of 0 to 6 (0 = “ never ” to 6 = “always”). The higher score expressed higher cognitive integration level. The Cronbach's alpha of the questionnaire was 0.92, in addition the test–retest reliability was 0.67. In this study, the CFQ’s Cronbach’s alpha was 0.97.
Acceptance and Action Questionnaire-II
The Chinese version of the AAQ‐II was used to evaluate avoidance behaviour (25), the measure was originally developed by Bond et al. (9). The questionnaire comprises seven items with a 7-point Likert scale. The higher score reflected higher avoidance behaviour level, thereby suggesting decreased psychological flexibility levels. Previous studies have established that the AAQ-II Cronbach’s alpha was 0.84 and test–retest reliability was 0.81. In this study, the AAQ‐II’s Cronbach’s alpha was 0.94.
Depression-Anxiety-Stress Scale
We used the Depression, Anxiety and Stress Scale – 21 Items (DASS-21) (26) to assess the experienced degree of negative emotions. Each dimension comprises seven questions with a range of 0 to 3 (0 = “does not meet with” to 3 = “always in line with”). Higher scores indicate more negative emotions.
The Chinese edition of the DASS-21 has been established as a trustworthy and valid measurement (27, 28). The repored Cronbach's alpha was 0.912, in addition the retest reliability was 0.751 (29). In our study, the Cronbach's alpha of this questionnaire was 0.93.
Self-Compassion Scale
Self-compassion was assessed using the Chinese version of the Self-Compassion Scale (SCS) originally developed by Neff (30). The Cronbach's alpha was 0.84 ,in addition the retest reliability was 0.89 (20). The 26-item scale is subdivided into six components:self-kindness, self-judgement, common humanity, isolation, mindfulness, and over-identification.Each item was assessed on a 5-point Likert scale by the participants. High scores indicated high levels of participants' self-compassion and low levels of negative emotions. The Cronbach's alpha was 0.85 for the SCS in our investigation.
Utrecht Work Engagement Scale
Work engagement was evaluated using the modified Chinese version of the Utrecht Work Engagement Scale (UWES)(31), which was initially developed by Schaufeli and Bakker (32). It contains 16 items with three subscale measures, including vigour, dedication, and absorption. Each items score ranges from 0-4.The Cronbach's alpha was 0.90. In our study, the UWES’s Cronbach’s alpha was 0.88.
Demographic Information
The demographic variables contained gender, age, education, marital status, number of children, nursing profession year, sleep quality, physical exercise, participation in emotion management training, and attendance of nurses’ self-compassion training.
Statistical Analysis
SPSS 20.0 and AMOS 23.0 were used to analyse. We calculated the descriptive statistics, including numbers and percentages for the sociodemographic characteristics of respondents and the mean as well as standard deviations for participants’ psychological flexibility, negative emotions, self-compassion, and work engagement. To examine the associations between the variables,Pearson’s correlation analysis was performed. SEM was used to test the mediation model, with psychological flexibility (PGF) as the independent variables, UWES as the dependent variables, and using the DASS-21 and SCS as the mediating variables.