Reliability and construct validity of the Colombian version of the quality of life instrument Skindex-29© in Medellin, Colombia
DOI:
https://doi.org/10.17533/udea.iatreia.v30n1a02Keywords:
Colombia, quality of life, reliability, Skindex-29, validityAbstract
Background: The cultural adaptation of quality of life instruments and their psychometric evaluation should be done rigorously and according to the standards.
Objective: This study assessed the reliability and construct validity of the Colombian version of the Skindex-29 instrument.
Methods: Patients with inflammatory or generalized skin diseases and with non-inflammatory or localized diseases, and healthy individuals were included. We determined the intra- and inter-observer reliability.
Results: We surveyed 265 individuals. Cronbach’s alpha was 0.957 for the total instrument. The intraclass correlation coefficients for intra-observer and inter-observer consistency were higher than 0.9. Patients with generalized or inflammatory diseases had higher scores than those with non-inflammatory or isolated lesions.
Conclusions: The results support the construct validity of the studied instrument. In the future, it is necessary to evaluate other psychometric properties such as its content and criteria validity, and its sensitivity to change.
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(1.) Jones-Caballero M, Peñas PF, García-Díez A, Chren MM, Badía X. [The Spanish version of Skindex-29. An instrument for measuring quality of life in patients with cutaneous diseases]. Med Clin (Barc). 2002 Jan;118(1):5-9. DOI 10.1016/S0025-7753(02)72266-5. Spanish.
(2.) Abeni D, Picardi A, Pasquini P, Melchi CF, Chren MM. Further evidence of the validity and reliability of the Skindex-29: an Italian study on 2,242 dermatological outpatients. Dermatology. 2002;204(1):43-9.
(3.) Chren MM, Lasek RJ, Flocke SA, Zyzanski SJ. Improved discriminative and evaluative capability of a refined version of Skindex, a quality-of-life instrument for patients with skin diseases. Arch Dermatol. 1997 Nov;133(11):1433-40.
(4.) Lewis V, Finlay AY. 10 years experience of the Dermatology Life Quality Index (DLQI). J Investig Dermatol Symp Proc. 2004 Mar;9(2):169-80.
(5.) Gómez C, Ospina MB. Desarrollo de cuestionarios, adaptación y validación de escalas. En: Ruiz Morales A, Morillo Zárate LE. Epidemiologia Clínica: Investigación Clínica Aplicada. 4a ed. Bogotá: Panamericana; 2009. p. 163-80.
(6.) Velarde-Jurado E, Avila-Figueroa C. [Methodological considerations for evaluating quality of life]. Salud Publica Mex. 2002 Sep-Oct;44(5):448-63. Spanish.
(7.) de Tiedra AG, Mercadal J, Badía X, Mascaró JM, Lozano R. A method to select an instrument for measurement of HR-QOL for cross-cultural adaptation applied to dermatology. Pharmacoeconomics. 1998 Oct;14(4):405-22.
(8.) de Tiedra AG, Mercadal J, Badia X, Mascaró JM, Herdman M, Lozano R. Adaptación transcultural al español del cuestionario Dermatology Life Quality Index (DLQI): El índice de calidad de vida en Dermatología. Actas Dermo-Sifiliogr. 1998;89(12):692-700.
(9.) Herdman M, Fox-Rushby J, Badia X. ‘Equivalence’ and the translation and adaptation of health-related quality of life questionnaires. Qual Life Res. 1997 Apr;6(3):237-47.
(10.) Herdman M, Fox-Rushby J, Badia X. A model of equivalence in the cultural adaptation of HRQoL instruments: the universalist approach. Qual Life Res. 1998 May;7(4):323-35.
(11.) Finlay AY. Quality of life measurement in dermatology: a practical guide. Br J Dermatol. 1997 Mar;136(3):305-14.
(12.) Finlay AY, Khan GK. Dermatology Life Quality Index (DLQI)--a simple practical measure for routine clinical use. Clin Exp Dermatol. 1994 May;19(3):210-6.
(13.) Both H, Essink-Bot ML, Busschbach J, Nijsten T. Critical review of generic and dermatology-specific health-related quality of life instruments. J Invest Dermatol. 2007 Dec;127(12):2726-39.
(14.) Chren MM, Lasek RJ, Quinn LM, Covinsky KE. Convergent and discriminant validity of a generic and a disease-specific instrument to measure quality of life in patients with skin disease. J Invest Dermatol. 1997 Jan;108(1):103-7.
(15.) Chren MM, Lasek RJ, Quinn LM, Mostow EN, Zyzanski SJ. Skindex, a quality-of-life measure for patients with skin disease: reliability, validity, and responsiveness. J Invest Dermatol. 1996 Nov;107(5):707-13.
(16.) Jones-Caballero M, Peñas PF, García-Díez A, Badía X, Chren MM. The Spanish version of Skindex-29. Int J Dermatol. 2000 Dec;39(12):907-12.
(17.) Sanclemente G, Lugo LH, Medina L, Jones-Caballero M, García HI. Preprueba para la adaptación cultural de la versión española del instrumento de calidad de vida dermatológico Skindex-29, en Colombia. Rev Asoc Colomb Dermatol. 2011;19:273-79.
(18.) MacCallum RC, Widaman KF, Zhang S, Hong S. Sample size in factor analysis. Psychol Methods. 1999 Mar;4(1):84-99. DOI 10.1037/1082-989X.4.1.84.
(19.) Osborne JW, Costello AB. Sample size and subject to item ratio in principal components analysis. Pract Aassess Res Eval [Internet] 2004. [consultado 2015 Nov 10]; 9(11). Disponible en: http://PAREonline.net/getvn.asp?v=9&n=11
(20.) Iacobucci D, Duhachek A. Advancing Alpha: Measuring Reliability With Confidence. J Consum Psychol. 2003;13(4):478-87. DOI 10.1207/S15327663JCP1304_14.
(21.) Yurdugul H. Minimum sample size for cronbach’s coefficient alpha: a monte-carlo study. Hacet U Egitim Fak. 2008;35:397-405.
(22.) Walter SD, Eliasziw M, Donner A. Sample size and optimal designs for reliability studies. Stat Med. 1998 Jan;17(1):101-10.
(23.) Jones-Caballero M, Peñas PF. Calidad de vida (II). Calidad de vida en Dermatología. Actas Dermosifiliogr 2002;93(8):481-9 DOI 10.1016/S0001-7310(02)76619-2.
(24.) Kim DY, Lee JW, Whang SH, Park YK, Hann SK, Shin YJ. Quality of life for Korean patients with vitiligo: Skindex-29 and its correlation with clinical profiles. J Dermatol. 2009 Jun;36(6):317-22. DOI 10.1111/j.1346-8138.2009.00646.x.
(25.) Choi S, Kim DY, Whang SH, Lee JH, Hann SK, Shin YJ. Quality of life and psychological adaptation of Korean adolescents with vitiligo. J Eur Acad Dermatol Venereol. 2010 May;24(5):524-9. DOI 10.1111/j.1468-3083.2009.03452.x.
(26.) Taborda ML, Blessmann Weber M, Machado Teixeira KA, Paixão Lisboa A, de Quevedo Welter E. [Evaluation of the quality of life and psychological distress of patients with different dermatoses in a dermatology referral center in southern Brazil]. An Bras Dermatol. 2010 Jan-Feb;85(1):52-6. DOI 10.1590/S0365-05962010000100007. Portuguese.
(27.) Baron SE, Morris PK, Dye L, Fielding D, Goulden V. The effect of dermatology consultations in secondary care on treatment outcome and quality of life in new adult patients with atopic dermatitis. Br J Dermatol. 2006 May;154(5):942-9.
(28.) Kilkenny MF, Marks R. The frequency and nature of skin conditions seen in a private dermatology practice in central Victoria, 1991-95. Australas J Dermatol. 1996 May;37 Suppl 1:S50-3.
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