International Journal of Hematology and Oncology 2018, Vol 28, Num 1 Page(s): 001-010
The Assessment of the Effect of Changes in Lung Cancer Follow-up Period on the Quality of Life Using EQ-5D Questionnaire and Follow Data (AKAYAK-1 Multicenter Project)

Ahmet E. ERBAYCU1, Tuncay GOKSEL2, Erhan ESER3, Kader K. GURSUL1, Burcu BASARIK2, Aysen OZ4, Pınar CELIK4, Ebru C. EDIZ5, Osman HATIPOGLU5, Bedriye A. YAYLA6, Sevin BASER6, Hakan BAYDUR3

1Izmir Dr. Suat Seren Chest Diseases and Thoracic Surgery Training and Research Hospital, Department of Chest Diseases, Izmir
2Ege University, Faculty of Medicine, Department of Chest Diseases, Izmir
3Celal Bayar University, Faculty of Medicine, Department of Public Health, Manisa
4Celal Bayar University, Faculty of Medicine, Department of Chest Diseases, Manisa
5Trakya University, Faculty of Medicine, Department of Chest Diseases, Edirne
6Pamukkale University, Faculty of Medicine, Department of Chest Diseases, Denizli, TURKEY

Keywords: Lung cancer, Quality of life, EQ-5D, EQ-5D Visual Analogue Scale, Validity
The EURO-QOL (EQ-5D), a generic quality of life measure, is a self-report scale. The aim was to study the reliability, validity and feasibility of the Turkish version of the EQ-5D as an instrument to evaluate quality of life in lung cancer patients in Turkish society. A prospective cohort study carried out within the framework of the multicenter Lung Cancer Association Project which was conducted in collaboration with Turkish Thoracic Society, Lung and Pleural Malignancies working group and Health and Quality of Life Society. A total of 266 patients were included in the study with a mean age of 61.3 years. 75,9% of the patients had chemotherapy alone; 9% received sequential chemotherapy and radiotherapy, 8,6% were given concurrent chemotherapy and radiotherapy, and 6,4% of them received radical radiotherapy alone. EQ-5D score measures at the moment of diagnosis were found to be moderately reliable while measures at the 3rd chemotherapy cycle, 5th chemotherapy cycle and after the radiotherapy were highly reliable. The items of the EQ-5D were found to be consistent among themselves. EQ-5D Visual Analogue Scale scores at diagnosis, the 3rd cycle, the 5th cycle and following radiotherapy were assessed to be correlated with each other. EQ-5D scale was found to be valid as it meets the conditions of 6 fit indices in our study design. The psychometric properties of the Turkish version of the EQ-5D questionnaire is a valid and reliable scale for patients with lung cancer in Turkey and it can be safely used in clinical practices.