Repression and high anxiety are associated with aberrant diurnal cortisol rhythms in women with metastatic breast cancer.
Previous research has provided evidence of autonomic, endocrine, and immunological dysregulation in repressers and a possible association with cancer incidence and progression. Recently published data from the authors' laboratory demonstrated that flatter diurnal cortisol slopes were a risk factor for early mortality in women with metastatic breast cancer. In the current analysis of this same sample (N=91), the authors tested differences at baseline between groups scored using the Weinberger Adjustment Inventory on diurnal cortisol slope and mean cortisol levels. When compared with self-assured and nonextreme groups, the represser and high-anxious groups had a significantly flatter diurnal slope. Diurnal slope was similar for repressers and high-anxious groups. Groups did not differ on mean cortisol levels, nor did they differ on intercept (morning) values.