medigraphic.com

2020, Number 1

Med Cutan Iber Lat Am 2020; 48 (1)

Evaluation of quality of life in patients with acne: validation of a measurement scale

Muvdi S, Moreno S, Rodríguez V, Charry L

Language: Spanish
References: 37
Page: 29-40
PDF size: 330.86 Kb.


ABSTRACT

Introduction: In Colombia there are no specific validated instruments to assess quality of life in acne. This study performed a Spanish and psychometric linguistic validation of an instrument to assess quality of life in acne. Material and methods: Psychometric validation in patients with acne. Internal consistency and stability over time were evaluated with Cronbach’s a and Lin correlation coefficients, sensitivity to change by calculating standardized mean response (SMR) and content related evidence with Delphi method. Factor analysis was performed to evaluate internal structure. Evidence of construct validity was evaluated with Kruskal Wallis or Spearman correlation. Results: Internal consistency is adequate (Cronbach’s a of 0.74-0.90); stability is moderate (Lin’s correlation 0.67 to 0.72). The sensitivity to change presents satisfactory results (SMR 0.61-0.90) and the results of associations with other variables provide evidence of construct validity. The confirmatory factor analysis allows to conclude that the four domains structure is not maintained and the exploratory factor analysis using principal factor analysis yields three factors. Conclusions: The Spanish version of the Acne-QoL scale is considered conceptually and semantically equivalent to the original version, demonstrating adequate psychometric properties, but can benefit from some modifications.


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