Reducing opioid use for chronic pain with a group-based intervention: Economic evaluation using randomised controlled trial data.
BACKGROUND AND AIMS Long-term strong opioid use for chronic non-malignant pain (CNMP) represents a significant public health challenge, associated with reduced health-related quality of life (HRQoL) and increased mortality. The Improving the Wellbeing of people with Opioid Treated CHronic pain (I-WOTCH) trial demonstra...