DSM 5 divides fibromyalgia into four groups based on the differences in psychological and autonomic nervous system profiles among affected individuals. These four groups are: extreme sensitivity to pain with no associated psychiatric conditions, fibromyalgia with comorbid pain-related depression, depression with concomitant fibromyalgia syndrome, and fibromyalgia due to somatization.
Fibromyalgia classification
Fibromyalgia diagnostic criteria
Fibromyalgia epidemiology and demographics
Back pain epidemiology and demographics
Dermatomyositis classification
Polymyalgia rheumatica epidemiology and demographics
Ankylosing spondylitis classification
Osteoarthritis classification