title: Reliability and validity of the Turkish version of myastheniagravis-quality of life questionnaire-15 item.
abstract: OBJECTIVE
  The myasthenia gravis-quality of life questionnaire 15 item (MG-QOL15) is a validated, short, and easy to use disease-specific quality of life (QOL) tool in myasthenia gravis. Other than Turkish, a lot of versions of the MG-QOL15 have been used in different languages in different cultures. Therefore, the aim of this study was to translate and construct a validated and adapted Turkish version of the MG-QOL15 [MG-QOL15(T)].
  
  
  METHODS
  After translation, back-translation, and comparison of the 2 English versions of the MG-QOL15, it was tested by 22 monolingual healthy individuals and then 23 patients with clinically stable MG. Afterwards, 11 voluntary patients out of these 23 patients were interviewed for a second time. During the second interview, the MG-QOL15(T) and the 36-item short-form health survey (Turkish version) were administered simultaneously.
  
  
  RESULTS
  The MG-QOL15(T) was found to have high internal consistency (1st and 2nd evaluation Cronbach's alphas were 0.958 and 0.928, respectively), test-retest reliability, and concurrent validity. The MG-QOL15(T) was negatively correlated with physical functioning, general health, vitality, and social functioning domains and with the physical and mental composite scores of the SF-36.
  
  
  CONCLUSIONS
  The MG-QOL15(T) is accepted to be a valid, reliable, valuable tool for measuring disease-specific QOL in Turkish patients with MG.
authors: Department of Neurology, Faculty of Medicine, İstanbul Medipol University, İstanbul, Turkey.
authors: Nida Fatma
authors: NF
authors: Taşcilar
authors: Department of Psychiatry, Faculty of Medicine, Bülent Ecevit University, Zonguldak, Turkey.
authors: Özge
authors: Ö
authors: Saraçli
authors: Department of Public Health, Faculty of Medicine, Bülent Ecevit University, Zonguldak, Turkey.
authors: Mehmet Ali
authors: MA
authors: Kurçer
authors: Department of Biostatistics, Faculty of Medicine, Düzce University, Düzce, Turkey.
authors: Handan
authors: H
authors: Ankarali
authors: Department of Neurology, İstanbul Training and Research Hospital, İstanbul, Turkey.
authors: Ufuk
authors: U
authors: Emre
mesh_terms: D006801:Humans; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014177:Translations; D014421:Turkey
keywords: Myasthenia gravis; quality of life; questionnaire