The Clinical journal of pain
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To study the prevalence of upper extremity disorders (UEDs) and neck as a total and complaints of the arm, neck and/or shoulder (CANS) not caused by acute trauma or any systemic disease as defined in the CANS model in the open population and to assess sociodemographic and health characteristics of chronic symptoms. ⋯ UEDs and CANS frequently occur in the open population. Excluding acute traumas and systemic diseases reduced the prevalence of CANS and resulted in a relatively healthier population. A compound definition of CANS seems indicated because of the large overlap of affected anatomic sites.