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Table 2 Test-retest reliability of mean MPI scale scores and Internal consistency of the items at scale level for all subjects (n = 204)

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

MPI subscales T0 (m,s) T1 (m,s) ICC (95% CI) CA (95% CI)
Pain severity (100 = most) 76.1 (16.5) 73.9 (16.0) 0.77 (0.70–0.82) 0.81 (0.77–0.86)
Interference (100 = worst) 74.7 (15.9) 72.5 (16.1) 0.82 (0.77–0.86) 0.83 (0.76–0.86)
Life control (100 = best) 49.4 (22.1) 50.2 (21.4) 0.57 (0.47–0.66) 0.76 (0.69–0.81)
Negative mood (100 = worst) 61.0 (19.6) 58.4 (22.1) 0.72 (0.65–0.78) 0.60 (0.49–0.69)
Support (100 = most) 69.4 (24.8) 69.0) 26.2) 0.85 (0.80–0.88) 0.82 (0.77–0.86)
Negative responses (100 = most) 25.6 (26.1) 24.3 (24.4) 0.75 (0.69–0.81) 0.86 (0.82–0.89)
Solicitous responses (100 = best) 58.3 (25.0) 58.6 (25.0) 0.87 (0.83–0.90) 0.81 (0.76–0.85)
Distracting responses (100 = best) 53.6 (25.3) 55.3 (24.8) 0.77 (0.71–0.82) 0.69 (0.61–0.76)
General activity (100 = most) 34.5 (13.7) 35.1 (13.4) 0.86 (0.82–0.90) 0.82 (0.78–0.86)
  1. MPI: Multidimensional Pain Inventory, CA: Cronbach’s alpha, 95% CI: 95% confidence interval, T0: 4 weeks before entry to pain management program, T1: at entry to pain management program, m: mean, s: standard deviation, ICC: intraclass correlation coefficient.