Research or Clinical Assessment Tool World Health Organization quality of life instrument, short form true The WHOQOL-BREF is a 26-item instrument consisting of four domains: physical health (7 items), psychological health (6 items), social relationships (3 items), and environmental health (8 items); it also contains QOL and general health items. Each individual item of the WHOQOL-BREF is scored from 1 to 5 on a response scale, which is stipulated as a five-point ordinal scale. The scores are then transformed linearly to a 0–100-scale. https://www.ncbi.nlm.nih.gov/pubmed/31961886 WHO-QOL BREF