Psychometrican analysis and dimensional structure of the Brazilian version of melasma quality of life scale (MELASQoL-BP)
An. bras. dermatol
;
91(4): 422-428, July-Aug. 2016. tab, graf
Artículo
en Inglés
| LILACS
| ID: lil-792445
ABSTRACT
Abstract Background:
Although asymptomatic, melasma inflicts significant impact on quality of life. MELASQoL is the main instrument used to assess quality of life associated with melasma, it has been validated in several languages, but its latent dimensional structure and psychometric properties haven´t been fully explored.Objectives:
To evaluate psychometric characteristics, information and dimensional structure of the Brazilian version of MELASQoL.Methods:
Survey with patients with facial melasma through socio-demographic questionnaire, DLQI-BRA, MASI and MELASQoL-BP, exploratory and confirmatory factor analysis, internal consistency of MELASQoL and latent dimensions (Cronbach's alpha). The informativeness of the model and items were investigated by the Rasch model (ordinal data).Results:
We evaluated 154 patients, 134 (87%) were female, mean age (± SD) of 39 (± 8) years, the onset of melasma at 27 (± 8) years, median (p25-p75) of MASI scores , DLQI and MELASQoL 8 (5-15) 2 (1-6) and 30 (17-44). The correlation (rho) of MELASQoL with DLQI and MASI were 0.70 and 0.36. Exploratory factor analysis identified two latent dimensions Q1-Q3 and Q4-Q10, which had significantly more adjusted factor structure than the one-dimensional model Χ2 / gl = 2.03, CFI = 0.95, AGFI = 0.94, RMSEA = 0.08. Cronbach's coefficient for the one-dimensional model and the factors were 0.95, 0.92 and 0.93. Rasch analysis demonstrated that the use of seven alternatives per item resulted in no increase in the model informativeness.Conclusions:
MELASQoL-BP showed good psychometric performance and a latent structure of two dimensions. We also identified an oversizing of item alternatives to characterize the aggregate information to each dimension.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Calidad de Vida
/
Encuestas y Cuestionarios
/
Melanosis
Tipo de estudio:
Estudios de evaluación
/
Estudio pronóstico
/
Investigación cualitativa
Límite:
Adulto
/
Femenino
/
Humanos
/
Masculino
País/Región como asunto:
America del Sur
/
Brasil
Idioma:
Inglés
Revista:
An. bras. dermatol
Asunto de la revista:
Dermatologia
Año:
2016
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Estadual Paulista "Júlio de Mesquita Filho"/BR
Similares
MEDLINE
...
LILACS
LIS