The Psychiatric Status Schedule for epidemiological research. Methodological considerations

Area of Science:

• Psychiatry
• Epidemiology
• Psychopathology Assessment

Background:

• The Psychiatric Status Schedule (PSS) was developed to enhance the research utility of clinical assessments in psychopathology.
• Its application extends to epidemiological studies for case finding in general populations.
• Concerns exist regarding the PSS's internal consistency in general population samples, questioning its epidemiological utility.

Purpose of the Study:

• To challenge the notion that low internal consistency invalidates the PSS for epidemiological use.
• To demonstrate the validity of the PSS for epidemiological case identification.
• To re-evaluate the PSS's utility in distinguishing clinical populations from the general population.

Main Methods:

• Utilized an existing dataset to re-examine the PSS's psychometric properties.
• Analyzed the PSS's ability to discriminate between outpatients and the general population.
• Assessed the PSS's effectiveness in identifying various definitions of psychiatric cases.

Main Results:

• The PSS exhibits validity for epidemiological applications.
• The instrument successfully differentiates psychiatric outpatients from individuals in the general population.
• The PSS effectively identifies psychiatric "cases" based on multiple definitions.

Conclusions:

• The PSS possesses demonstrated validity for epidemiological research and case finding.
• Methodological concerns regarding internal consistency do not preclude the PSS's utility in population studies.
• The PSS remains a valuable tool for assessing psychopathology in diverse populations.