A new approach to the measurement of quality of life — the Patient Generated Index (original article).
Patient centred assessment of quality of life for patients with four common conditions (low back pain, menorrhagia, suspected peptic ulcer, and varicose veins).
How should we evaluate health status? A comparison of three methods in patients presenting with obstructive sleep apnoea – this paper is compares three approaches to the measurement of patient-reported health status which produce summary scales of health status
Patient centered assessment of ankylosing spondylitis-specific health related quality of life: evaluation of the Patient Generated Index (English).
http://www.ncbi.nlm.nih.gov/pubmed/12672197