Validation of the Polish version of the EORTC Head and Neck module (QLQ-H&N35).

The aim of this study was to psychometrically validate the EORTC translated, Polish version of the EORTC QLQ-H&N35 questionnaire to support using it in the Polish clinical setting in patients with head and neck malignancies.Patients with histologically confirmed head and neck malignancies were included in the study. All patients filled in the Polish version of the EORTC QLQ-C30, the EORTC QLQ-H&N35 module, and a demographic questionnaire. Standardized validity and reliability analyses were performed.During the recruitment period a total of 176 patients (82 females - 46.6%) were enrolled into the study, with a mean age of 54.3 ± 11.2 years. Cronbach alpha values ranged from 0.71 to 0.87. Satisfactory convergent and discriminant validity in multi-trait scaling analyses was seen.The Polish version of the EORTC QLQ-H&N35 module is a reliable and valid tool for measuring HRQoL in Polish patients with head and neck malignancies. It can be fully recommended for use in the Polish clinical setting.