Psychometrican analysis and dimensional structure of the Brazilian version of melasma quality of life scale (MELASQoL-BP)

Abstract

BackgroundAlthough 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.ObjectivesTo evaluate psychometric characteristics, information and dimensional structure of the Brazilian version of MELASQoL.MethodsSurvey 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).ResultsWe 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.ConclusionsMELASQoL-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.

Association between clinical characteristics, quality of life, and sleep quality in patients with periorbital hyperchromia

“…The mean value of DLQI found in the sample is classified as a mild effect on the quality of life of patients with POH. However, when compared to other common dermatological diseases, it is noted that the DLQI scores found in some studies on acne, atopic dermatitis, and psoriasis present mean values that correspond, in general terms, to the range of moderate effect on dermatological quality of life . Although there is less impairment of DLQI values when compared to other conditions, quality of life is negatively affected in POH.…”

Factors associated with quality of life in facial melasma: a cross‐sectional study

“…Psychometric measures, as MELASQoL can diverge from clinimetric severity (as MASI) because they subjectively considers the individual perception of the impact from a disease, while MASI objectively assess the extension of the disease and is directly linked to its pathophysiology .…”

“…Psychometric measures, as MELASQoL can diverge from clinimetric severity (as MASI) because they subjectively considers the individual perception of the impact from a disease, while MASI objectively assess the extension of the disease and is directly linked to its pathophysiology [9,13,21]. This study first identified socio-demographic factors that influence either clinimetric and QoL scores in facial melasma, what can explain why MASI and MELASQoL have only modest correlation between their scores in most publications [6-8, 22, 23].…”

Impacto do Melasma na Autoestima de Mulheres / Impact of Melasma on Women's Self-Estems

“…Dentre as participantes, 80% relataram fazer uso de anticoncepcional, seu grande uso pode estar relacionado ao surgimento do melasma, pois é frequentemente associado à exposição crônica à radiação ultravioleta (UV), esteróides sexuais (gravidez e contraceptivos orais) e fatores genéticos com envolvimento familiar são implicados como suas principais causas. (LEE , 2015;MARANZATTO, 2016;PARK, 2017). Segundo Becker, (2017) 40-50% de todos os pacientes, o melasma começa na gravidez ou como parte de uma terapia contraceptiva oral, reforçando ainda mais a necessidade da investigação a respeito do uso do anticoncepcional como forma de manifestação do melasma.…”

“…Distúrbios de pigmentação, incluindo melasma, é a terceira queixa mais frequente em consultas dermatológicas (8,4%) com variação de acordo com a faixa etária, sexo e região do país, atingindo milhões de pessoas em todo o mundo (HANDOG, 2017). Sua prevalência populacional varia de acordo com a composição étnica, fototipos e intensidade da exposição solar (MARANZATTO, 2016). A patologia é comum entre hispano-americanos e brasileiros que vivem em áreas intertropicais, onde a exposição à radiação ultravioleta é mais intensa (SANTOS, 2016).…”