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Table 1 Inclusion- and exclusion criteria

From: Study protocol: Transition from localized low back pain to chronic widespread pain in general practice: Identification of risk factors, preventive factors and key elements for treatment – A cohort study

Inclusion criteria All patients with chronic* low back pain** as a primary or secondary consulting reason in general practice.
  *”chronic” was defined as pain during most days in the last three months.
  **”low back pain” means pain in the back area under the costal arch, but over the bottom fold (with or without pain radiation).
Exclusion criteria - patients under 18 years
  - pregnant women
  - persons with insufficient fluency of speaking German language or dementia (subjective impressed by doctor)