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01-04-2014 | Uitgave 3/2014

Quality of Life Research 3/2014

Preliminary reliability and validity of Persian version of the Family Dermatology Life Quality Index (FDLQI)

Quality of Life Research > Uitgave 3/2014
H. Safizadeh, N. Nakhaee, S. Shamsi-meymandi, N. Pourdamghan, M. K. A. Basra



Family Dermatology Life Quality Index (FDLQI) is an instrument for assessing the quality of life of family members of dermatologic patients. The aim of this study was to describe the cultural adaptation of this questionnaire and to assess psychometric properties of the Persian version.


At first, the questionnaire was translated into Persian, and then back-translation was performed. The whole cycle was repeated until a consensus was reached about the optimal translation. In the next step, cognitive debriefing was performed, and after approval of the Persian version by FDLQI developers, it was distributed among 100 family members of dermatological patients in order to evaluate its validity and reliability.


Mean age of participants was 37.1 years (±12.3). Mean score of FDLQI was 15.4 (±5.5) with maximum and minimum scores of 30 and 6, respectively. The quality of life of studied participants showed no significant difference based on age-group, sex, educational level and the family relationship. Cronbach’s alpha was calculated as 0.87. Exploratory factor analysis revealed a one-factor solution that accounted for 40.7 % of the variance. The unidimensional model was supported by confirmatory factor analysis.


The results of the present study showed that the Persian version of FDLQI has acceptable factorial validity and internal consistency reliability.

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