Validation of the Russian version of the fatigue module of the EORTC Quality of Life Questionnaire for cancer patients

Introduction. The article presents the results of validation of the Russian language version of the fatigue (FA12) module of the specialized Quality of Life Questionnaire – Core 30 (QLQ-C30) developed by the Study Group of Quality of Life of the European Organization for Research and Treatment Cancer (EORTC). The questionnaire has been successfully applied in Russian and international trials.Materials and methods. A sample of 55 patients (mean age 53.23± 2.01 years; 52.7 % men and 47.3 % women) at the N.N. Blokhin National Medical Research Center of Oncology was used to perform psychometric review of the fatigue module (FA12) of the QLQ-C30 questionnaire which confirmed its convergent validity and reliability – consistency (Cronbach coefficient α is 0.768).Results. The results of factor analysis confirmed adequacy of the structure of the Russian version of the fatigue module and its conformity with the basic factor model.Conclusion. The obtained results allow to state that the Russian version of the fatigue module is a reliable and valid instrument which can be used both in national and cross-cultural trials.