The EQ-5D-5L survey, designed to collect data on health status and significant changes, will be administered to every patient in the registry at each clinic visit and at least every six months for five years after enrollment.
The EQ-5D-5L consists of five dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. Each dimension features five levels: no problems, slight problems, moderate problems, severe problems, and extreme problems. Patients indicate their health state by ticking the box next to the most appropriate statement for each dimension. This choice generates a one-digit number representing the selected level for that dimension. The numbers from the five dimensions can be combined into a five-digit number that characterizes the patient's health state.