2.10. Quality-of-Life-Assessment Scale
The WHOQOL-BREF is a simplified quality-of-life assessment scale developed by the World Health Organization. The original version of the questionnaire was provided by the WHO and was approved for utilization and translation into Chinese. The WHOQOL-BREF has 28 questions covering overall physiological, psychological, social, and environmental assessments. It is widely used and has cross-national validity. The scale lasts about 5 min.