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Table 4 Self-rated improvement and pain intensity (unadjusted estimates)

From: Do psychological and behavioral factors classified by the West Haven-Yale Multidimensional Pain Inventory (Swedish version) predict the early clinical course of low back pain in patients receiving chiropractic care?

Variable AC (n = 167) ID (n = 75) DYS (n = 87)
Self-rated Improvement:
 Definite improvement at 4th visit, % (n; p-value C) 64.7 (108; .56 C) 68.0 (51; .56 C) 71.3 (62; .56 C)
 Chance of definite improvement at 4th visit, expressed as relative risk A(95 % CI; p-value) Ref 1.05A (.87–1.27; .61) 1.10A (.93–1.31; .28)
Pain intensity:
 Pain intensity at 1st visit 0–10, mean (SD; p-value B) 4.47 (1.94; <.01 B) 6.51 (1.97; <.01 B) 6.70 (1.64; <.01 B)
 Pain intensity at 4th visit 0–10, mean (SD; p-value B) 2.47 (1.85; <.01 B) 3.57 (1.90; <.01 B) 3.92 (2.14; <.01 B)
 Difference in pain intensity between 1st and 4th visit, mean (SD; p-value B) 2.01 (2.30; <.01 B) 2.93 (2.11; <.01 B) 2.78 (2.35; <.01 B)
 Reduction of pain intensity of 30 % or more between 1st and 4th visit, dichotomized, % (n; p-value C) 63.5 (106; .39 C) 72.0 (54; .39 C) 63.2 (55; .39 C)
 Chance of a reduction of pain intensity of 30 % or more between 1st and 4th visit, dichotomized, expressed as relative risk A (95 % CI; p-value) Ref 1.13 A (.82–1.57; .45) 1.00 A (0.72–1.38; .98)
  1. AC, Adaptive Coper; ID, Interpersonally Distressed; DYS, Dysfunctional; A Adjustment for “patient’s expectation of improvement” meant only very small changes in the estimates; B One way Anova for overall difference between the MPI-S groups; C Chi2 test for overall difference