Objectives: Primary: To estimate the prevalence of depression and/or anxiety disorder in outpatients attending the general health care settings in China.

Secondary:

• To estimate gender- and age-specific prevalence of depression and/or anxiety disorder in outpatients attending the general health care settings in China.
• To estimate the prevalence of depression and/or anxiety disorder in outpatients attending the general health care settings such as departments of neurology, gastroenterology, cardiology, and gynecology.
• To describe the recognition and treatment rate by treating physicians as depression and/or anxiety for outpatients in the general health care settings in China.

This study is designed to investigate the status of identifying depression and/or anxiety disorder with somatic symptoms in general hospitals in China. The study will generate valuable information to the medical community; therefore the early and vigorous treatment is possible. It's in line with China government authorities' target to increase the recognition rate of depression and/or anxiety in primary care settings to more than 50% by the end of 2010. The study will also help to identify specific diagnosis and treatment patterns for depressive / anxious patients and their comorbid conditions.

Main Inclusion Criteria:

• Greater than or equal to 18 years.
• Consecutive general internal medical outpatients attending the selected general hospitals in the investigate days(Department of neurology, gastrointestinal, cardiology and gynecology).
• Informed consent obtained for all patients who will undergo a standardized diagnostic assessment by specialized psychiatrists.

Main Exclusion Criteria:

• Patients who have been screened on a previous visit.
• Patients who are unable to complete the survey because of mental or physical incapacity.