Health-promoting behaviours and psychological distress in breast cancer with endocrine therapy: Mediating roles of menopausal symptoms and social support

Objective To investigate the relationship between health-promotion behaviour and psychological distress and whether menopausal symptoms and social support mediate these relationships in patients with breast cancer receiving endocrine therapy. Study design This was a cross-sectional study involving convenience sampling that involved 226 patients with breast cancer. Main outcome measures Participants were investigated by self-reporting questionnaires that included demographic and clinical information, the Kessler psychological distress scale, the Health-Promoting Lifestyle Profile Ⅱ, the Menopause Rating Scale, and the Perceived Social Support Survey to measure psychological distress, health-promoting behaviour, menopausal symptoms, and social support, respectively. Mediation analyses were conducted with the bootstrapping method to test for mediating factors. Results In total, 78.7% patients reported that they were suffering from psychological distress. Their health-promoting behaviours were directly and negatively associated with psychological distress. In addition, health-promoting behaviour had a significant indirect effect on psychological distress through menopausal symptoms and social support. Mediating effects accounted for 34.8% and 27.6% of the total effect, respectively. Conclusions There was a high prevalence of psychological distress in patients with breast cancer receiving endocrine therapy. Menopausal symptoms and social support mediated the association between health-promoting behaviour and psychological distress. Health professionals should evaluate menopausal symptoms and health lifestyles, and provide professional interventions to increase health-promoting behaviours and manage unpleasant somatic symptoms for patients and their caregivers; these actions may improve their psychological distress.