E-ISSN 2148-5607
Gastrointestinal Tract - Original Article
The validity and reliability studies of the University of California, Los Angeles Scleroderma Clinical Trial Consortium Gastrointestinal Tract (UCLA SCTC GIT) 2.0 questionnaire for the Turkish society
1 Division of Nephrology, Department of Internal Medicine, Pamukkale University School of Medicine, Denizli, Turkey  
2 Division of Gastroenterology, Department of Internal Medicine, Tepecik Training and Research Hospital, İzmir, Turkey  
3 Department of Biostatistics, Dokuz Eylül University School of Medicine, İzmir, Turkey  
4 Division Rheumatology, Department of Internal Medicine, Dokuz Eylül University School of Medicine, İzmir, Turkey  
5 Private Practice, İzmir, Turkey  
6 Division of Gastroenterology, Department of Internal Medicine, Dokuz Eylül University School of Medicine, İzmir, Turkey  
Turk J Gastroenterol ; : -
DOI: 10.5152/tjg.2018.17856
Key Words: Scleroderma, gastrointestinal system, validity, reliability, UCLA
Abstract

Background/Aims: To translate the University of California, Los Angeles Scleroderma Clinical Trial Consortium Gastrointestinal Tract (UCLA SCTC GIT) 2.0 questionnaire from English to Turkish and to validate it.

 

Materials and Methods: UCLA SCTC GIT 2.0 was translated into Turkish using the translation-retranslation method. The available Turkish GIT 2.0 and the Short Form 36 (SF-36) were administered to 97 Turkish-speaking patients with systemic sclerosis (Ssc). Internal consistency reliability and structural validity were assessed by analyzing the correlations between the UCLA SCTC GIT 2.0 and the SF-36 scales. Internal consistency was determined by calculating Cronbach’s alpha. For evaluation of reliability, the questionnaire scale was repeatedly applied to a subgroup of patients with a 2-week interval, and the intraclass correlation coefficient (ICC) was calculated. The Spearman’s correlation coefficients between the GIT and the SF-36 scores were calculated.

 

Results: A group of 97 patients with Ssc with a mean age of 55.37±11.35 years and a female predominance (87.6%) were included in the study. The Cronbach’s alpha value for the UCLA SCTC GIT 2.0 scale was 0.894. ICC was 0.821 (p=0.000). The scale showed acceptable reliability, with the exception of the diarrhea subscale (alpha=0.356). There was a moderate correlation between the total GIT score and the Short Form 36 (SF-36) subscales. All of the items in the scale were included in the validity analysis owing to their reliability.

 

Conclusion: The Turkish GIT 2.0 scale showed good internal consistency, high reliability, and an acceptable validity.

 

Cite this article as: Taş YM, Derviş Hakim G, Keskinoğlu P, et al. The validity and reliability studies of the University of California, Los Angeles Scleroderma Clinical Trial Consortium Gastrointestinal Tract (UCLA SCTC GIT) 2.0 questionnaire for the Turkish society. Turk J Gastroenterol 2018; DOI: 10.5152/tjg.2018.17856.

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