The SDS is a depression self-rating scale, which determines the patient’s depression status through 20 questions, and the patient’s performance in the past six months, answering these 20 questions, which one of the four types of “constant, frequent, sometimes, none or occasionally”, and deriving a score. The SDS scale is easy to use, reflects the patient’s subjective feelings of depression, and is widely used in outpatient clinics to screen for depression as a preliminary assessment of the effectiveness of depression in subsequent treatment. Some of the questions on the scale are as follows: I feel depressed, I don’t sleep well at night, I feel weight loss, I worry about constipation, I feel tired for no reason, I get irritated more easily than usual, I still like the things I usually like, my life is meaningful, etc. By answering whether one of these questions falls into the categories of having this condition consistently, having this condition often, having this condition sometimes, or not having this condition, the final score is derived and all the scores are added up.