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Table 3 Changes in the Roland-Morris Disability, McGill Pain and SF-12 questionnaires between groups at follow-up (N = 501)

From: Effectiveness of a multidisciplinary BIOPSYCHOSOCIAL intervention for non-specific SUBACUTE low back pain in a working population: a cluster randomized clinical trial

 Control Group (n = 239)Intervention Group (n = 262)Difference (95%CI) between group (IG - CG)
ValueDifference*(95% CI)ValueDifference*(95% CI)change IG - CGP-valueAdjusted difference**P-value
RMDQ, mean (SD)
 Baseline9.9 (5.3) 10.0 (5.2)     
 three months7.4 (5.5)−2.3 (−3.1 to −1.6)6.2 (4.9)−3.8 (−4.5 to −3.2)−1.5 (− 2.5 to −0.5)0.003*−1.33 (− 2.22 to − 0.45)0.005*
 12 months6.0 (5.7)−3.8 (− 4.8 to − 2.9)5.1 (4.9)−5.1 (−5.8 to − 4.3)− 1.2 (− 2.4 to − 0.0)0.043*−1.11 (− 2.08 to − 0.13)0.027*
MPQ
 Total intensity score, mean (SD)
  Baseline6.5 (3.1) 6.7 (3.1)     
  three months4.6 (3.6)−1.8 (−2.3 to − 1.3)4.0 (3.6)− 2.7 (− 3.2 to − 2.2)− 0.9 (− 1.6 to − 0.1)0.022*−0.49 (− 1.39 to 0.42)0.294
  12 months3.6 (3.6)−2.8 (− 3.3 to − 2.2)3.1 (3.2)−3.6 (− 4.1 to − 3.0)− 0.8 (− 1.6 to 0.0)0.040*−0.69 (− 1.41 to 0.02)0.058**
 Current Intensity score mean (SD)
  Baseline2.6 (1.1) 2.5 (1.2)     
  three months1.7 (1.5)−0.9 (− 1.1 to − 0.7)1.3 (1.4)−1.2 (− 1.4 to − 1.0)−0.3 (− 0.6 to 0.0)0.083−0.32 (− 0.63 to − 0.02)0.040*
  12 months1.6 (1.4)−1.1 (− 1.3 to 0.8)1.4 (1.3)−1.1 (− 1.3 to − 0.9)0.0 (−0.3 to 0.3)0.854−0.18 (− 0.43 to 0.08)0.162
 VAS, mean (SD)
  Baseline5.9 (2.3) 5.8 (2.3)     
  three months4.1 (3.3)−1.8 (−2.2 to − 1.3)3.2 (3.2)− 2.7 (−3.1 to − 2.2)−0.9 (− 1.6–0.3)0.004*−0.77 (− 1.53 to − 0.01)0.046*
  12 months3.9 (3.2)−2.0 (− 2.5 to − 1.5)3.6 (3.0)−2.3 (− 2.7 to − 1.9)− 0.3 (− 0.9 to 0.4)0.404−0.27 (− 0.88 to 0.34)0.374
 SF-12 Physical health, mean (SD)
  Baseline40.7 (9.3) 41.9 (9.0)     
  three months45.3 (9.8)4.2 (2.7 to 5.6)46.5 (8.7)4.5 (3.2 to 5.8)0.4 (− 1.6 to 2.3)0.7160.55 (− 1.19 to 2.29)0.520
  12 months46.2 (9.5)5.0 (3.3 to 6.7)47.0 (8.9)4.9 (3.5 to 6.3)−0.1 (−2.3 to 2.1)0.9220.53 (−1.20 to 2.27)0.532
 SF-12 Mental health, mean (SD)
  Baseline42.3 (12.4) 43.4 (12.8)     
  three months45.0 (13.2)2.6 (0.7 to 4.6)48.8 (12.0)5.1 (3.4 to 6.9)2.5 (−0.1 to 5.0)0.0612.56 (− 0.33 to 5.45)0.082
  12 months47.0 (11.9)5.0 (2.9 to 7.1)48.9 (11.2)5.5 (3.6 to 7.5)0.5 (−2.3 to 3.4)0.7071.48 (−0.86 to 3.83)0.206
  1. Abbreviations: SD standard deviation, CI confidence interval, RMDQ Roland-Morris Disability Questionnaire (scale 0–24; lower scores indicate less disability), MGPQ McGill pain questionnaire; 3 dimensions (sensorial, affective and evaluative) with Total Intensity Score (scale 0–14), Current Intensity Score (scale 0–5) and Visual Analogical Scale (VAS, scale 0–10); SF-12 = 12-item short-form health survey version 1 (scale 0–100; lower scores indicate worse health related quality of life). * Differences were calculated between follow-up and baseline measurements. Mean differences are shown for quantitative outcomes and percentage differences for dichotomous outcomes. **All models were adjusted for the score at baseline, significant confounders and significant interaction variables. Intervention group minus usual care group, mean differences are shown for quantitative outcomes and odds ratios for dichotomous outcomes. Intervention group minus usual care group, mean differences are shown for quantitative outcomes and odds ratios for dichotomous outcomes. Total Intensity Score, VAS Pain Score and Mental Health were estimated with a mixed model considering the PHCC as random effect