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Table 6 Chance-corrected measures of agreement of different back pain classification systems comprising psychosocial aspects

From: Reliability of the Multidimensional Pain Inventory and stability of the MPI classification system in chronic back pain

Classification system No. of clusters Percent agreement Kappa coefficient (κ)
MPI Classification System 3 75–82% 0.58–0.70 (current study)
Treatment Based Classification 3 65% 0.49–0.56 [30]
   76% 0.60 [31]
   31–55% 0.14–0.45 [32]
   79–81% 0.14 [33]
   58–90% 0.11–0.77 [34]
O’Sullivan Classification System 5 70–97% 0.61 (0.47–0.80) [35]
   73–92% 0.65 (0.57–0.74) [36]
  1. MPI: Multidimensional Pain Inventory.