Abstract: Objective To evaluate the clinical, psychological, sociological and biological risk factors of suicide in psychiatric emergency patients. Methods Cross-sectional analysis was conducted on the psychiatric emergency patients from 2015 to 2017 in Beijing Anding Hospital affiliated to Capital Medical University. Suicidal thoughts and behaviors (STB) were assessed using the suicidal risk factor assessment form. The score ≤10 and > 10 points indicate the presence and absence of STB, respectively. A multivariate Logistic regression analysis was applied to determines the risk factors for STB. Results A total of 12 345 patients were enrolled, including 6 885 (56%) female patients. The average age is 36 (27-50) years old. The average scores of Brief Psychiatric Rating Scale (BPRS) total scores, Hamilton Anxiety Scale (HAMA) total scores, Hamilton Depression Scale (HAMD) total scores and Yung Manic Rating Scale (YMRS) total scores were 32 (27-39) points, 7 (3-13) points, 10 (6-15) points and 7 (4-18) points. According to the suicide risk assessment form, 3 436 patients (27.83%) were at risk of STB. Multi-factor analysis showed that the residence, gender, marital status, co-residents, years of education, occupational status, relationship with parents and siblings, incentive, premorbid personality, clarified diagnosis, physical illness, BPRS score,HAMA score, HAMD score, YRMS score, medical treatment time, and the number of psychiatric hospitalizations is independent risk factors for STB. Conclusion The risk of suicide in psychiatric emergency patients was higher, mainly in the young and middle-aged, especially in the mental illness patients who were male, unmarried, unemployed, with poor social and family support. STB was affected by physiological, psychological and social factors in this population.

Key words: psychiatric emergency, suicidal thoughts, suicidal behaviors, epidemiology