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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.