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The Cardiff Acne Disability Index (CADI): linguistic and cultural validation in Serbian

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Abstract

Purpose

The aims of this study were to translate the Cardiff Acne Disability Index (CADI) into Serbian and to assess its validity and reliability in Serbian acne patients.

Methods

The CADI was translated and linguistically validated into Serbian according to published guidelines. This version of CADI, along with the Serbian version of Children’s Dermatology Life Quality Index (CDLQI) and a short demographic questionnaire, was administrated to a cohort of secondary school pupils. The Global Acne Grading Score was used to measure the clinical severity of acne. The internal consistency reliability of the Serbian version of CADI was assessed by Cronbach’s alpha coefficient while its concurrent validity was assessed by Spearman’s correlation coefficient. Construct validity was examined by factor analysis.

Results

A total of 465 pupils completed questionnaires. Self-reported acne was present in 76% of pupils (353/465). The Serbian version of CADI showed high internal consistency reliability (Cronbach’s alpha coefficient = 0.79). The mean item-total correlation coefficient was 0.74 with a range of 0.53–0.81. The concurrent validity of the scale was supported by a moderate but highly significant correlation with the CDLQI (Spearman’s rho = 0.66; P < 0.001). Factor analysis revealed the presence of two dimensions underlying the factor structure of the scale.

Conclusions

The Serbian version of the CADI is a reliable, valid, and valuable tool for assessing the impact of acne on the quality of life of Serbian-speaking patients.

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Abbreviations

AQOL:

Acne Quality of Life

Acne-QoL:

Acne-Specific Quality of Life

Acne-Q4:

4-Item index of Acne Quality of Life

CADI:

Cardiff Acne Disability Index

CDLQI:

Children’s Dermatology Life Quality Index

DLQI:

Dermatology Life Quality Index

ISPOR:

International Society for Pharmacoeconomics and Outcomes Research

PCA:

Principal Component Analysis

QoL:

Quality of Life

SF-36:

Short Form-36

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Acknowledgments

This study was supported by the Ministry of Education and Science, Serbia, Project No. 175025. We thank Professor Andrew Finlay, Department of Dermatology and Wound Healing, Cardiff University School of Medicine, Cardiff, UK, for the formal permission to translate and use the CADI in this study.

Conflict of interest

There is no conflict of interest.

Author information

Authors and Affiliations

  1. Institute of Epidemiology, Faculty of Medicine, University of Belgrade, Višegradska 26, 11000, Belgrade, Serbia

    Slavenka Jankovic

  2. Institute of Dermatovenereology, Clinical Center of Serbia and Faculty of Medicine, University of Belgrade, Belgrade, Serbia

    Jelica Vukicevic

  3. Health Center “Euromedik”, Belgrade, Serbia

    Sanja Djordjevic

  4. Institute of Social Medicine, Faculty of Medicine, University of Belgrade, Belgrade, Serbia

    Janko Jankovic

  5. Institute of Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, Belgrade, Serbia

    Jelena Marinkovic

  6. Department of Dermatology and Wound Healing, Cardiff University School of Medicine, Cardiff, UK

    Mohammad K. A. Basra

Authors
  1. Slavenka Jankovic
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  2. Jelica Vukicevic
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  3. Sanja Djordjevic
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  4. Janko Jankovic
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  5. Jelena Marinkovic
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  6. Mohammad K. A. Basra
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Correspondence to Slavenka Jankovic.

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Jankovic, S., Vukicevic, J., Djordjevic, S. et al. The Cardiff Acne Disability Index (CADI): linguistic and cultural validation in Serbian. Qual Life Res 22, 161–166 (2013). https://doi.org/10.1007/s11136-012-0136-4

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  • DOI: https://doi.org/10.1007/s11136-012-0136-4

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