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Table 4 Cluster score changes and pairwise analyses for significance after the four week pain management program

From: Differences in pain, function and coping in Multidimensional Pain Inventory subgroups of chronic back pain: a one-group pretest-posttest study

MPI subgroup Interpersonally distressed
(n = 61)
Adaptive copers
(n = 56)
Dysfunctional
(n = 50)
p
Subscales Entry (m,s) Discharge (m,s) ES (95% CI) Entry (m,s) Discharge (m,s) ES (95% CI) Entry (m,s) Discharge (m,s) ES (95% CI) ID-AC ID-DYS AC-DYS
MPI             
Pain severity 70.4 (16.4) 61.7 (20.3) 0.53 (0.24-0.81) 77.3 (13.2) 61.2 (18.1) 1.22 (0.86-1.58) 84.3 (11.9) 74.3 (19.3) 0.84 (0.44-1.24) 0.006 0.900 0.055
Interference with pain 64.9 (14.1) 57.8 (17.8) 0.50 (0.24-0.77) 66.2 (14.7) 54.8 (17.7) 0.78 (0.50-1.05) 85.3 (10.2) 76.0 (17.2) 0.92 (0.49-1.34) 0.201 0.271 0.847
Life control 48.1 (18.1) 57.2 (20.0) 0.50 (0.22-0.79) 63.4 (13.6) 67.5 (16.9) 0.30 (-0.06-0.66) 31.9 (17.3) 50.9 (18.2) 1.10 (0.76-1.43) 0.289 0.032 0.008
Affective distress 55.7 (21.9) 46.9 (20.4) 0.41 (0.20-0.61) 39.7 (18.5) 32.9 (20.2) 0.37 (0.11-0.62) 76.1 (16.0) 55.3 (21.7) 1.30 (0.91-1.70) 0.650 0.001 0.001
Support 41.2 (24.1) 45.6 (26.1) 0.18 (-0.03-0.40) 89.1 (12.0) 83.4 (15.7) -0.47 (-0.74 - -0.21) 87.1 (14.7) 81.6 (17.9) -0.38 (-0.69 - -0.07) 0.001 0.019 0.565
Solicitous responses 32.5 (17.5) 37.9 (23.9) 0.31 (0.02-0.60) 77.7 (16.3) 72.3 (20.8) -0.33 (-0.57 - -0.09) 73.6 (17.7) 71.0 (22.7) -0.15 (-0.38-0.09) 0.002 0.017 0.397
General activities 40.8 (12.5) 40.8 (15.4) 0.00 (-0.22-0.23) 41.5 (12.9) 42.8 (15.5) 0.10 (-0.07-0.27) 32.0 (14.4) 34.9 (17.0) 0.20 (-0.01-0.41) 0.691 0.594 0.343
SF-36             
Physical functioning 46.0 (20.7) 51.1 (21.4) 0.25 (0.05-0.44) 43.1 (22.2) 51.3 (22.6) 0.37 (0.16-0.58) 34.7 (19.6) 41.0 (22.0) 0.32 (0.12-0.53) 0.675 0.354 0.839
Bodily pain 23.5 (12.7) 31.0 (15.4) 0.60 (0.26-0.94) 19.5 (11.1) 30.5 (15.4) 0.99 (0.61-1.37) 14.0 (12.8) 18.1 (14.1) 0.32 (0.09-0.56) 0.083 0.330 0.007
Mental health 46.8 (20.4) 54.3 (19.1) 0.37 (0.16-0.57) 57.8 (19.1) 64.4 (17.5) 0.34 (0.15-0.54) 33.4 (13.9) 45.4 (19.1) 0.86 (0.55-1.17) 0.926 0.073 0.057
HADS             
Anxiety 52.5 (22.1) 57.9 (18.3) 0.25 (0.06-0.43) 60.5 (18.5) 66.1 (17.0) 0.30 (0.12-0.48) 37.5 (15.4) 43.7 (18.8) 0.40 (0.15-0.65) 0.438 0.341 0.585
Depression 57.5 (20.1) 64.6 (21.0) 0.35 (0.18-0.53) 65.1 (18.4) 72.9 (20.1) 0.42 (0.24-0.60) 39.9 (18.3) 48.0 (24.0) 0.44 (0.18-0.71) 0.311 0.655 0.864
CSQ             
Catastrophizing 50.2 (17.9) 53.8 (19.4) 0.20 (0.02-0.39) 51.2 (15.4) 57.5 (18.8) 0.41 (0.19-0.64) 35.1 (17.2) 42.2 (21.2) 0.41 (0.17-0.65) 0.141 0.277 0.822
Increasing activity level 55.6 (15.0) 57.2 (17.4) 0.11 (-0.13-0.34) 63.8 (13.4) 64.2 (13.7) 0.03 (-0.20-0.26) 51.5 (16.9) 54.4 (17.2) 0.17 (-0.07-0.41) 0.621 0.766 0.852
Ability to control pain 48.0 (24.4) 48.0 (21.0) 0.00 (-0.28-0.28) 48.5 (22.1) 56.5 (18.7) 0.36 (0.13-0.60) 33.3 (22.8) 41.5 (22.3) 0.36 (0.09-0.63) 0.048 0.009 0.600
Ability to decrease pain 38.7 (20.4) 39.5 (20.0) 0.04 (-0.23-0.32) 36.9 (19.3) 49.4 (19.3) 0.65 (0.36-0.94) 32.3 (23.4) 38.0 (21.0) 0.24 (0.00-0.48) 0.003 0.776 0.025
  1. MPI = Multidimensional Pain Inventory; SF-36 = Medical Outcomes Studies Short Form-36; HADS = Hospital Anxiety and Depression Scale; CSQ = Coping Strategies Questionnaire; m = mean subscale score; s = standard deviation; ES = effect size; p = significance level (type I error) of the Mann-Whitney-U-test