Graded chronic pain status: an epidemiologic evaluation.

@article{Korff1990GradedCP,
  title={Graded chronic pain status: an epidemiologic evaluation.},
  author={Michael R Von Korff and Samuel Franklin Dworkin and L Le Resche},
  journal={Pain},
  year={1990},
  volume={40 3},
  pages={279-91}
}
In epidemiologic research on chronic pain, differentiation of recurrent, persistent and disabling pain states is critical in the investigation of burden, natural history, effective intervention and causal processes. We report population-based data concerning the development and evaluation of a graded classification of pain status. In a probability sample of 1016 health maintenance organization enrollees, recurrent or persistent pain was observed in 45%; severe and persistent pain in 8%; severe… CONTINUE READING

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