Association between Chinese herbal medicine (CHM) treatment and depression among cancer patients in China: An outpatient-based cross-sectional study

Depression is a prevalent condition among cancer patients and significantly impacts their quality of life. Traditional Chinese Medicine, particularly Chinese Herbal Medicine (CHM), has shown potential in both anti-tumor and anti-depressive effects. However, there is a dearth of scientific literature exploring the association between CHM treatment and depression in cancer patients. This study aims to investigate the relationship between CHM treatment and depression in cancer patients. A cross-sectional study was conducted among cancer outpatients at Longhua Hosiptal, Shanghai University of Traditional Chinese Medicine, from June 2020 to April 2021 (Ethical approval number: 2020LCSY057). All patients signed informed consent and completed The European Organization for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire (EORTC QLQ-C30). Hamilton depression scale was evaluated depression by psychiatrists. The power of the sample size was determined using Gpower statistical and SPSS were used for statistical analysis. A total of 809 completed the study. Gender, medical insurance, the classification of time since diagnosis, ECOG, cancer stage, metastasis, gene mutation, treatment plan and CHM treatment were an important factor affecting depression (P < .05). Further analysis investigated the impact of CHM treatment on depression. There were 374 enrolled in CHM group and 435 enrolled in Non-CHM group. The assessment results of Hamilton depression scale and EORTC QLQ-C30 in CHM group were superior to those in Non-CHM group. The morbidity of depression is 50.27% in CHM group and 66.44% in Non-CHM group. After adjusting for potential confounders (gender, medical insurance, cancer stage, etc.), CHM treatment indicated negative correlation with depression (Odds ratio (OR) = 0.7, 95% confidence interval (CI): 0.5-0.9, P = .020). The interaction effects within each subgroup were no significantly affect the relationship between CHM treatment and depression (P > .05). CHM treatment was an independent protective factor for depression in cancer patients, and lead to better quality of life for cancer patients.