Cognitive variables associated with depressive and anxiety symptoms in patients with cancer: A five-year follow-up study.

Background: Patients with cancer are at increased risk of developing symptoms of depression and anxiety. However, data on the variables associated with these symptoms in the long term are scant. This study aims to evaluate rumination and thought suppression as explanatory variables of depressive and anxiety symptoms at one- and five-year follow-up in patients diagnosed with cancer.

Methods: A total of 131 patients with cancer were assessed at baseline (≤4 months of diagnosis), and at 1 and 5 years after diagnosis. A battery of self-reported measures was used to evaluate anxiety and depressive symptoms, rumination, thought suppression, social support, and self-efficacy. The associations among these variables were assessed with linear mixed-effects models.

Results: The models for depressive and anxiety symptoms explained 43.5% and 44.2% of the variance, respectively. Rumination was a significant explanatory variable of both depressive and anxiety symptoms over the five-year follow-up period, while thought suppression was only associated with anxiety symptoms. Female gender was associated with a higher risk of presenting anxiety symptoms but this same variable was also protective against depressive symptoms.

Conclusions: The assessment and treatment of rumination and thought suppression in patients diagnosed with cancer is advisable, as these cognitive domains seem to be associated to symptoms of emotional disorders in the long term.