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
Artigo
em Inglês
| LILACS
| ID: lil-792445
Biblioteca responsável:
BR1.1
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:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Qualidade de Vida
/
Inquéritos e Questionários
/
Melanose
Tipo de estudo:
Estudo de avaliação
/
Estudo prognóstico
/
Pesquisa qualitativa
Aspecto:
Preferência do paciente
Limite:
Adulto
/
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
An. bras. dermatol
Assunto da revista:
Dermatologia
Ano de publicação:
2016
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Estadual Paulista "Júlio de Mesquita Filho"/BR