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Table 1 Participants’ baseline characteristics and subjective rehabilitation success for both treatment conditions

From: Psychological and work-related outcomes after inpatient multidisciplinary rehabilitation of chronic low back pain: a prospective randomized controlled trial

Variable Control group (n = 288) Intervention group (n = 295)
Socio-demographic data   
 Age [in years] (mean ± SD) 53.25 ± 6.09 53.26 ± 6.03
 Gender, females no. (%) 235 (81.60%) 242 (82.03%)
 Married no. (%) 180 (62.50%) 190 (64.41%)
 Educational level (%)
   − low 58 (20.71%) 58 (19.93%)
   − middle 143 (51.07%) 136 (46.74%)
   − high 79 (28.21%) 97 (33.33%)
Work-related data
 Employed no. (%) 246 (85.42%) 257 (87.12%)
 Days of sick leave due to pain in the last 3 months, more than 2 weeks no. (%) 133 (46.18%) 148 (50.17%)
 Work ability score (WAI) (mean ± SD) 27.05 ± 8.47 26.41 ± 8.26
Pain history
 Pain duration [in years] (mean ± SD) 14.64 ± 9.98 15.73 ± 11.59
 Pain locations no. (mean ± SD) 5.15 ± 2.53 5.35 ± 2.44
 Average pain intensity (mean ± SD) 4.90 ± 1.90 4.91 ± 1.79
 Grade of chronicity (MPSS) no. (%)   
  I 69 (24.82%) 71 (25.00%)
  II 133 (47.84%) 152 (53.52%)
  III 76 (27.34%) 61 (21.48%)
Psychological status
 Depressive symptoms (CES-D) (mean ± SD) 23.82 ± 11.43 22.63 ± 10.84
 Pain self-efficacy (PSEQ) (mean ± SD) 38.32 ± 11.29 38.99 ± 12.04
Subjective rehabilitation success (mean ± SD) 4.14 ± 1.32 4.27 ± 1.25
  1. Chi2- and t-tests revealed no differences between control and intervention group
  2. WAI work ability index, MPSS Mainz Pain Staging System, CES-D Center for Epidemiological Studies Depression Scale, PSEQ pain self-efficacy questionnaire, range of depressive symptoms: 0–60, range of pain self-efficacy: 10–60, work ability score: impaired (7–27) to excellent (44–49), pain intensity: ‘no pain’ (0) to ‘pain as bad as could be’ (10), subjective rehabilitation success: ‘very good’ (1) to ‘insufficient’ (6)