A Multicenter Case-control Study of Risk Factors for Premature Ejaculation in China's Shaanxi Province

Inclusion Criteria: * 1\) case group 1. 18-64 years old, regular sexual life \> 6 months; 2. Self-report of premature ejaculation; 3. Able to complete questionnaires and scale scores independently. 2) control group <!-- --> 1. 18-64 years old, regular sexual life \> 6 months; 2. Both partners are satisfied with their sexual life; 3. Able to complete questionnaires and scale scores independently. Exclusion Criteria: * 1\) case group 1. Those who are unable to have sex due to genital malformation; 2. Patients with serious cardiovascular and cerebrovascular diseases; 3. Severe mental disorders (history of epilepsy, mania, etc.); 4. Have a history of brain trauma; 5. People with a long history of substance abuse. 2) control group <!-- --> 1. Patients with a history of mental illness; 2. Oral selective serotonin (5-ht) reuptake inhibitors, tricyclic antidepressants, triazolidine antidepressants, tramadol and sedatives