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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.