THE DISTRIBUTION AND ASSOCIATIONS OF CHRONIC PAIN SITES IN A COMMUNITY SAMPLE.

We conducted a community survey of the prevalence, health impact and location of chronic pain. We explored the relationship and patterns of chronic pain that commonly occur, with a view to understanding why some treatment approaches may be more appropriate than others for particular patterns of pain. In 2002, 2504 randomly sampled patients from 16 General Practices in the South East of England responded to a postal questionnaire about chronic pain. Those with chronic pain completed a pain drawing. We calculated descriptive statistics, relative risk and correlations to identify the associations and risks of having linked pain. The highest prevalences were low back (23%), shoulder (20%) and knee (18%) pain. The number of pain sites experienced was age related in men but less so in women. Lower body pain was more age related than upper body and non musculoskeletal pain. Multi site pain was more common than single site pain. Of those with low back, knee and shoulder pain, 14%, 4.5 % and 1.9% had only low back, knee and shoulder pain respectively. Correlations and minimum spanning trees showed that chronic upper and lower body pain are distinct and axial pain link the two. Chronic pain is more likely to be multi site, especially at middle age. Research, physical treatments and approaches to managing chronic pain are often site specific, therefore specialising treatment to one area eg low back pain often negates the bigger issue. This may help explain the self perpetuating problem of persistent chronic pain.