title: The latent structure of psychiatric symptoms across mental disorders as measured with the PANSS and BPRS-18.
abstract: Raw data were used from five studies of adults with mental illnesses (N=4,480) in an attempt to identify a psychiatric symptoms factor structure, as measured by the Positive and Negative Syndrome Scale or the Brief Psychiatric Rating Scale, that was generalizable across participant characteristics. First, the fit of four extant models was tested via confirmatory factor analysis (CFA), then exploratory factor analyses (EFA) were conducted with a 50% random sample, followed by a CFA with the remaining 50% to confirm the EFA factor structure. Measurement invariance of the factor structure was also examined across diagnosis, sex, race, age, and hospitalization status. The extant models were not generalizable to these data. However, a 4-factor (Affective, Positive, Negative, Disorganized Cognitive Processing) model was identified that retained all items and showed invariance across participant characteristics. It is possible to obtain a psychiatric symptoms factor structure that is generalizable across patient characteristics, which has clinical and research implications. Specifically, future research examining the impact of various interventions on psychiatric symptoms among adults with mental illnesses should confirm, and assuming good model-data fit, use the 4-factor model identified in this study.
authors.affiliation: Behavioral Health Epidemiology Program, RTI International, United States. Electronic address: rvandorn@rti.org.
authors.forename: Richard A
authors.initials: RA
authors.lastname: Van Dorn
authors.affiliation: Department of Psychology, North Carolina State University, United States.
authors.forename: Sarah L
authors.initials: SL
authors.lastname: Desmarais
authors.affiliation: Department of Psychology, Arizona State University, United States.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Grimm
authors.affiliation: Behavioral Health Epidemiology Program, RTI International, United States.
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Tueller
authors.affiliation: Behavioral Health Epidemiology Program, RTI International, United States.
authors.forename: Kiersten L
authors.initials: KL
authors.lastname: Johnson
authors.affiliation: Sociology, Anthropology, & Criminology Department, Eastern Michigan University, United States.
authors.forename: Brian G
authors.initials: BG
authors.lastname: Sellers
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, United States.
authors.forename: Marvin S
authors.initials: MS
authors.lastname: Swartz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005163:Factor Analysis, Statistical; D005260:Female; D006760:Hospitalization; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis* / Q000523:psychology; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D063189:Symptom Assessment; D055815:Young Adult
keywords: Between-diagnoses; Factor structure; Invariance; Mental illness