Factors associated with life quality, sleep quality, and depression in systemic sclerosis patients: a cross-sectional study from Iran

Our study showed a high prevalence of poor sleep quality and depressive symptoms among SSc patients. We found that gastrointestinal symptoms, respiratory symptoms, and digital ulcers affected patients' life quality, sleep quality, and mental status. Our results also demonstrated that depression was correlated with poor sleep quality, and they were both risk factors for diminished life quality. Identification of these factors would help to make pharmacological and non-pharmacological interventions to improve the quality of life and sleep in SSc patients.