Unsuccessful linguistic validation of the Symptom Questionnaire for assessing quality of life in Polish patients with pelvic vein disorders.

Pelvic venous disorder (PeVD) is a prevalent chronic condition characterized by the presence of varicose veins in the pelvis, leading to the development of chronic pelvic pain. Despite the growing interest in assessing quality of life in PeVD, well-designed and validated disease-specific questionnaires are missing. The objective of this study was a linguistic and clinical validation of the Symptom Questionnaire (SQ) in a cohort of Polish females with pelvic vein incompetence. The Polish version of SQ was developed using a standardized validation process that involved a back-and- forth translation protocol. A total of 58 female patients diagnosed with pelvic varicose veins, representing diverse educational back- grounds, participated in the study. Multiple issues were observed during linguistic validation, primarily originating from disparities between the Polish and British healthcare systems, as well as differing levels of sexual health education of those two populations. Cronbach α was calculated separately for each part of the questionnaire with results exceeded 0.6 for each section. Test-retest analysis indicated most Pearson correlation coefficients surpassing 0.70. The absolute agreement consistency between pretest and post-test measures, evaluated using the Intra Class Correlation (ICC), exceeded 0.8 in three sections and 0.7 in the remaining three sections. However, the clinical validation failed due to the lack of standardized score calculation proposed by the authors of the questionnaire and inaccurately assigned values in the answer key for five questions. Consequently, the practical utility of SQ in daily clinical settings remains uncertain, highlighting the urgent need for the development of a new, user-friendly questionnaire specifically tailored to assess the quality of life in individuals with PeVD.