The relationship between androgen deprivation therapy and depression symptoms in patients with prostate cancer

Aim: In this study, we administered a questionnaire to consecutive prostate cancer patients who received androgen deprivation therapy (ADT) for understanding the prevalence of depression symptoms. Materials and methods: We retrospectively identified patients with prostate adenocarcinoma who received ADT between January 2015 and February 2018 at Mackay Memorial Hospital. The patients were then asked to complete the Chinese version of the Patient Health Questionnaire-9 (PHQ-9) during an interview. The patients were divided into two groups according to PHQ-9 score: those with depression symptoms (PHQ-9 ≥ 6, depression group), and those without depression symptoms (PHQ-9 < 6, non-depression group). Two groups were compared using t-tests and correlation coefficients, as appropriate. Statistical significance was set at p <.05. Results: There were no significant correlations between PHQ-9 scores and any of the parameters in the patients overall. In subgroup analysis, a positive correlation was found between the duration of ADT and PHQ-9 score in the patients with depression symptoms (p =.03). In addition, univariate analysis showed a positive association between the duration of ADT and PHQ-9 score, and a longer duration of ADT was further independently associated with increased PHQ-9 score in multivariate analysis in the patients with depression symptoms. Conclusion: This study demonstrated that in patients with prostate cancer and depression symptoms, the severity of the depression symptoms was positively correlated with the duration of ADT. In contrast, this association was not found in patients without depression symptoms.