Study estimates persistent pain incidence at 19% of U.S. adults
From a public health perspective, the difference is significant, researchers wrote in the study. Those with persistent pain have high rates of work disability, fatigue, anxiety and depression. They also are at higher risk for long-term exposure to and dependency on pain medications.
http://news.nurse.com/article/20141029/NATIONAL06/310290021#.VFJxjml0ypo
See study here - http://www.jpain.org/article/S1526-5900%2814%2900774-3/fulltext