Translation, cultural adaptation, and validation of a lipedema symptoms questionnaire

Abstract Background Lipedema is characterized as abnormal bilateral deposition of fat in the buttocks and legs that may be accompanied by orthostatic edema in women. A questionnaire for assessment of lipedema symptoms has previously been published in German and English to assess treatment progress. Objectives To translate, culturally adapt, and validate the lipedema symptoms assessment questionnaire for Brazilian Portuguese. Methods The process involved three translations and two back-translations performed by independent translators, followed by construction of a consensus version and adaptation according patients’ comprehension. The questionnaire was converted into a digital version and administered to 56 volunteers and then administered to 154 patients from a vascular clinic and correlated with volume determined by segmental bioimpedance. Results The 20 pre-test patients were female and at least 90% of the interviewees were able to understand the questions in the final phase. Volunteers had a 96.4% rate of comprehension of the digital online version and a mean completion time of 4 minutes. In 154 patients, limb volume was positively correlated with intensity of symptoms, as assessed by the translated questionnaire, and 3 out of 15 questions were weakly correlated with educational level. Conclusions The translated and culturally adapted Brazilian Portuguese version of the lipedema symptoms assessment questionnaire (QuASiL) is a practical tool that is easy and quick to administer and can be used in our population. Additional studies are still needed to assess the instrument’s sensitivity as an aid for diagnosis of lipedema.