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Table 3 Baseline data for the study sample (subjects who completed the 4th visit with a complete MPI-S dataset, n = 329)

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) p
Number of subjects, % 50.8 22.8 26.4 -
Female, % (n) 58.1 (97) 60.0 (45) 75.9 (66) .02 C
Age, mean (n) 44.4 (78) A 43.7 (35) A 45.1 (43) A .87 B
Neck and/or thoracic pain ≤ 30 days, % (n) 29.9 (50) 25.3 (19) 27.6 (24) .75 C
Neck and/or thoracic pain >30 days, % (n) 30.5 (51) 34.7 (26) 39.1 (34) .39 C
Thigh, lower leg and low back pain, % (n) 19.2 (32) 28.0 (21) 34.5 (30) .02 C
Living alone % (n) .6 (1) 2.7 (2) .0 (0) -
Never visited chiropractor before, % (n) 52.7 (88) 45.3 (34) 47.1 (41) .50 C
Takes medication for their pain, % (n) 12.0 (20) 30.7 (23) 32.2 (28) <.01 C
EQ5D, mean (SD) .77 (.11) .57 (.24) .57 (.24) <.01 B
RMDQ A, mean (n; SD) 4.09 (79, 3.77) A 7.00 (35, 3.66) A 6.60 (45, 4.68) A <.01 B
Patients perceived health in general, % (n) Perfect 7.8 (13) 1.3 (1) 2.3 (2) <.01 C
Very good 47.0 (78) 18.7 (14) 18.4 (16)
Good 36.7 (61) 42.7 (32) 52.9 (46)
Fair 7.2 (12) 33.3 (25) 18.4 (16)
Poor 1.2 (2) 4.0 (3) 8.0 (7)
Patient expectation of improvement 0–10, mean (SD) 7.97 (2.21) 8.05 (1.96) 8.12 (1.86) .86 B
MPI-S scales:
 Pain Severity 0–6, mean (SD) 2.74 (.98) 3.87 (.94) 4.28 (0.79)  
 Interference 0–6, mean (SD) 2.08 (1.03) 3.61 (1.03) 4.00 (.83)  
 Life Control 0–6, mean (SD) 4.13 (.91) 2.70 (.88) 2.86 (.87)  
 Affective Distress 0–6, mean (SD) 1.94 (1.08) 3.68 (.90) 3.63 (.93)  
 Support 0–6, mean (SD) 3.98 (1.50) 2.95 (1.39) 5.22 (.76)  
 Punishing Responses 0–6, mean (SD) .59 (.76) 2.18 (1.52) .93 (1.04)  
 Solicitous Responses 0–6, mean (SD) 2.43 (1.16) 1.79 (.97) 4.06 (.99)  
 Distracting Responses (DR), mean (SD) 2.73 (1.38) 2.11 (1.17) 3.68 (1.09)  
  1. AC, Adaptive Coper; ID, Interpersonally Distressed; DYS, Dysfunctional; A Variable was only available for the subjects enrolled into the RCT; B One way Anova for overall difference; C Chi2 test for overall difference