The RAND-36 is perhaps the most widely used health- related quality of life (HRQoL) survey instrument in the world today. It is comprised of 36 items that assess eight health concepts: physical functioning, role limitations caused by physical health problems, role limitations caused by emotional problems, social functioning, emotional well- being, energy/fatigue, pain, and general health perceptions. Physical and mental health summary scores are also derived from the eight RAND-36 scales.[1]
[1] Ron D Hays & Leo S Morales (2001) The RAND-36 measure of health-related quality of life, Annals of Medicine, 33:5, 350-357, DOI: 10.3109/07853890109002089