Abstract
Background & Objectives: Breast cancer is one of the most common, dangerous, and emotionally and psychologically impressive cancers among women. Cognitive emotion regulation is a conscious way of managing emotional arousal and feelings in an individual. Distress tolerance is a perceived capacity to resist negative emotional states or other aversive states, including physical discomfort and the behavioral act of resisting distressing psychological states caused by stressors. Non–pharmacological interventions include mindfulness–based stress reduction. The mindfulness–based stress reduction program is a short–term, structured program introduced in the latest developments in cognitive therapies by Tazedale et al. in 1995. The limitations caused by breast cancer in an individual create psychological problems, including cognitive emotion regulation and reduced distress tolerance. So, the present study aims to investigate the effectiveness of mindfulness–based stress reduction on cognitive regulation of emotion and distress tolerance in women with breast cancer.
Methods: The research method was quasi–experimental with a pretest–posttest and a three–month follow–up design with a control group. The statistical population comprised women with breast cancer who visited a private clinic located in Tehran City, Iran, in 2022. They met the conditions to be included in the study. Among them, 30 people entered the study in a targeted and voluntary way and were randomly assigned to two groups of 15 women (experimental and control). The inclusion criteria for patients in the study were as follows: age range of 30–50 years, not taking neuropsychiatric medication in the past three months, not suffering from a serious psychiatric illness like psychosis, and not receiving other psychological interventions. Also, in terms of observing ethical considerations regarding data collection, the researchers closely monitored the completion of the questionnaires and provided the participants with necessary explanations. These explanations included the right to choose to participate in the research, confidentiality of personal information, the importance of participating in the study, and information related to the research topic. The subjects of the experimental group received 8 sessions of mindfulness–based stress reduction therapy (according to the protocol of Segal et al., 2002). The Cognitive Emotion Regulation Questionnaire (CERQ) (Garnefski and Karaij, 2006) and Distress Tolerance Scale (Simmons & Gaher, 2005) as research tools were implemented in two stages before and after training in both groups. Three months after the training, the experimental and control group participants answered the questionnaire's questions. The data were analyzed using the analysis of variance test with repeated measurements and the Bonferroni post hoc test in SPSS version 26. The significance level of the tests was considered 0.05.
Results: The effect of time on the three variables of adaptive strategies, non–adaptive strategies, and distress tolerance (p<0.001) and the effect of group on the three variables of adaptive strategies (p<0.001), non–adaptive strategies (p<0.001), and distress tolerance (p=0.033) was significant. Regarding the three variables in the experimental group, the difference between the mean scores of pretest, posttest, and follow–up was significant (p<0.001). However, the difference between the mean scores of the posttest and follow–up in the variables of adaptive strategies (p=0.088) and non–adaptive strategies (p=0.125) and distress tolerance (p=0.090) was not significant, showing that their effect was maintained during the three–month follow–up period.
Conclusion: According to the results of the research, the application of non–pharmacological stress reduction intervention based on mindfulness is effective in improving cognitive regulation of emotion and distress tolerance in breast cancer patients. Therefore, it is recommended to use a stress reduction program based on mindfulness in treatment centers for breast cancer patients.
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