Introduction: Sleep quality is one of the effective variables in other psychological characteristics, especially in multiple sclerosis patients. As a result, the present study was conducted with the aim of determine the role of interpersonal problems and illness perception in predicting sleep quality with mediating distress tolerance in multiple sclerosis patients.
Methods: This was a cross-sectional correlational study. The research population was all patients who were members of the Multiple Sclerosis Association of Urmia township in the first quarter of 2021 year. The sample size was estimated 315 people who were selected by available sampling method. The research data were collected by Barkham et all short version of interpersonal problems inventory (1996), Broadbent et all brief illness perception questionnaire (2006), Buysse et all Pittsburgh sleep quality index (1989) and Simons & Gaher distress tolerance scale (2005) and were analyzed by Pearson correlation coefficients and path analysis methods in SPSS-19 and PLS-3 software. This research with the IR.IAU.URMIA.REC.1400.022 ethics code is approved by the ethics committee in biomedical research of Islamic Azad University of Urmia branch.
Results: The results showed that the increase of interpersonal problems and negative perception of illness led to decrease the distress tolerance and loss of sleep quality and an increase of distress tolerance improved sleep quality. In addition, the decrease of interpersonal problems and negative perception of illness with mediating distress tolerance led to improved sleep quality (P<0.01).
Conclusions: According to the results, to improve the sleep quality of multiple sclerosis patients can be increased the rate of their interpersonal problems and illness perception and decreased their distress tolerance.

Introduction: Adverse effects of Coronavirus on somatic and mental health is undeniable .nurses staff are exposed to risk of somatic and psychological effects because of continuous working time. The aim of this study was to investigate the effectiveness of training coping strategies with stress on distress tolerance and psychological empowerment of corona nurses in Khoy hospitals.
Methods: This research was applied in terms of purpose and quasi-experimental in terms of research method with pre-test – post-test design with control group And from the statistical population that included all nurses in the corona ward of Khoy hospitals in  2021 , 30 people were selected as the available sample. The subjects were randomly assigned into two groups (15 individuals in experimental group and 15 individuals in control group).In order to collect data, the Distress Tolerance Questionnaire and the Psychological Empowerment Questionnaire were used. The experimental group subjects participated in eight 90-minute sessions of training coping strategies with stress. Multivariate analysis of covariance was used to test the hypotheses. This study was approved by the Ethics Committee of Islamic Azad University of Tabriz (Code: REC.1400.135).
Results: The results showed that training coping strategies has increased distress tolerance and psychological empowerment in the post-test phase (P < 0.01).
Conclusions: According to the findings of the present study, it can be concluded that teaching coping strategies can be used as an effective method to improve stress tolerance and psychological empowerment of coronary nurses.