The Self-Rating Depression Scale, abbreviated as sds, reflects a patient’s subjective depressive status and is widely used in outpatient screening for depression. The scale contains 20 questions, which are: 1) I feel depressed; 2) I feel good in the morning; 3) I need to cry or want to cry; 4) I don’t sleep well at night; 5) I eat as much as usual; 6) My sexual function is normal; 7) I feel weight loss; 8) I worry about constipation; 9) My heart beats faster than usual; 10) I feel fatigue for no reason; 11) My mind is as clear as usual; 12) I don’t feel difficulty in doing things as usual; 13) I sit down and do things as usual; 13) I feel tired for no reason. 12, I do not feel difficulty in doing things as usual; 13, I am restless and cannot keep calm; 14, I feel hopeful about the future; 15, I am more easily provoked than usual; 16, I find it easy to make any decision; 17, I feel useful and indispensable; 18, my life is meaningful; 19, if I die, others will have a better life 20, I still like the things I usually like. The 20 questions were used to find out which of the four categories of “constantly, often, sometimes, none, or occasionally” the patient has been feeling about the above issues in the past six months. Each question was given a corresponding score and the total score was added up, and a total score of more than 40 was considered as depression.