Table 1 Baseline demographic and clinical characteristics of patients in the complete dataset. Continuous variable values are represented as means (standard deviation). Dichotomous variable values are represented as numbers (percentages)
intervention group | control group | |
|---|---|---|
Patient characteristics | (n = 112) | (n = 114) |
mean age (years) | 45.4 (13.2) | 44.3 (14.4) |
male† | 52 (47%) | 55 (49%) |
Dutch origin‡ | 97 (91%) | 103 (93%) |
educational level‡ | ||
primary only | 15 (14%) | 19 (17%) |
secondary | 56 (52%) | 53 (48%) |
college, university | 36 (34%) | 39 (35%) |
employed§ | 73 (70%) | 71 (70%) |
Baseline clinical characteristics | ||
functional disability score (RMD 0–24) (primary measure)¶ | 10.7 (5.0) | 10.3 (5.2) |
pain severity at baseline (VAS 0–100 mm)|| | 48.6 (16.0) | 46.7 (16.7) |
absenteeism (yes/no)|| | 39 (35%) | 19 (20%) |
illness perception dimensions (IPQ)(0–10)§ | ||
consequences | 6.3 (2.3) | 6.1 (2.5) |
timeline | 4.2 (2.8) | 3.5 (2.4) |
personal control | 5.0 (2.2) | 5.4 (2.1) |
treatment control | 6.6 (1.9) | 6.9 (1.9) |
identity | 6.9 (1.6) | 7.2 (1.6) |
concerns | 4.5 (2.5) | 4.8 (2.6) |
illness comprehensibility | 6.0 (2.3) | 6.1 (2.3) |
emotional response | 5.0 (2.5) | 5.2 (2.6) |