Changes in Quality of Life after 3 months of Usual Care in a Large Sample of Patients with Noncancer Pain: The "QOOL: Quality of Life and Pain" Study.

Large-scale observational studies can provide useful information on changes in health outcomes over time. The aim of this study was to investigate the effect of 3 months of usual care on quality of life (QOL) and pain outcomes in noncancer chronic pain patients managed by pain specialists and to examine factors associated with changes in QOL. This was assessed using the EQ-5D and pain outcomes using the Brief Pain Inventory (BPI).