Dimensionality of the premenstrual syndrome: confirmatory factor analysis of premenstrual dysphoric symptoms among college students



Título del documento: Dimensionality of the premenstrual syndrome: confirmatory factor analysis of premenstrual dysphoric symptoms among college students
Revista: Brazilian journal of medical and biological research
Base de datos: PERIÓDICA
Número de sistema: 000350326
ISSN: 0100-879X
Autores: 1
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Instituciones: 1Universidade de Sao Paulo, Faculdade de Medicina, Sao Paulo. Brasil
Año:
Periodo: May
Volumen: 40
Número: 5
Paginación: 639-647
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés Premenstrual syndrome and premenstrual dysphoric disorder (PMDD) seem to form a severity continuum with no clear-cut boundary. However, since the American Psychiatric Association proposed the research criteria for PMDD in 1994, there has been no agreement about the symptomatic constellation that constitutes this syndrome. The objective of the present study was to establish the core latent structure of PMDD symptoms in a non-clinical sample. Data concerning PMDD symptoms were obtained from 632 regularly menstruating college students (mean age 24.4 years, SD 5.9, range 17 to 49). For the first random half (N = 316), we performed principal component analysis (PCA) and for the remaining half (N = 316), we tested three theory-derived competing models of PMDD by confirmatory factor analysis. PCA allowed us to extract two correlated factors, i.e., dysphoric-somatic and behavioral-impairment factors. The two-dimensional latent model derived from PCA showed the best overall fit among three models tested by confirmatory factor analysis (c253 = 64.39, P = 0.13; goodness-of-fit indices = 0.96; adjusted goodness-of-fit indices = 0.95; root mean square residual = 0.05; root mean square error of approximation = 0.03; 90%CI = 0.00 to 0.05; Akaike's information criterion = -41.61). The items "out of control" and "physical symptoms" loaded conspicuously on the first factor and "interpersonal impairment" loaded higher on the second factor. The construct validity for PMDD was accounted for by two highly correlated dimensions. These results support the argument for focusing on the core psychopathological dimension of PMDD in future studies
Disciplinas: Medicina
Palabras clave: Psiquiatría,
Ginecología,
Síndrome premenstrual,
Trastorno disfórico premenstrual,
Psicometría,
Análisis de componentes principales
Keyword: Medicine,
Psychiatry,
Gynecology,
Premenstrual syndrome,
Premenstrual dysphoric disorder,
Psychometrics,
Principal component analysis
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