Table 1

Characteristics of the study population

All patients (N = 103)Patients with improvement after 1 month (N = 70)Patients without improvement after 1 month (N = 14)Patients with improvement after 3 months (N = 71)Patients without improvement after 3 months (N = 11)
Age (SD)38.3 (±13.8)37.5 (±13.8)47.5 (±15.0)38.6 (±13.8)47.3 (±16.2)
Gender (m/f)35/6822/484/1027/442/9
Pain at baseline (SD)6.4 (±1.9)6.5 (±1.8)5.5 (±2.1)6.2 (±2.0)7.2 (±1.7)
BQ 4: anxiety BL/1 m/3 m (SD)5.5 (±2.9)5.6 (±2.8)4.3 (±2.9)5.3 (±3.0)6.7 (±1.7)
2.1 (±2.7)1.6 (±2.2)5.0 (±2.9)1.7 (±2.4)5.3 (±2.7)
1.7 (±2.6)1.4 (±2.2)2.5 (±2.9)1.0 (±1.9)6.0 (±2.0)
BQ 5: depression BL/1 m/3 m (SD)3.6 (±3.2)3.5 (±3.2)3.1 (±2.9)3.1 (±3.2)5.9 (±2.3)
1.6 (±2.7)1.0 (±2.1)3.9 (±3.6)1.2 (±2.3)4.3 (±3.5)
0.8 (±2.0)0.5 (±1.2)1.9 (±3.0)0.4 (±1.3)3.7 (±2.9)
BQ 6: fear avoidance BL/1 m/3 m (SD)4.7 (±3.1)4.6 (±3.1)4.6 (±2.6)4.5 (±3.2)5.7 (±1.6)
2.0 (±2.7)1.5 (±2.1)4.4 (±3.8)1.6 (±2.5)4.7 (±2.5)
1.7 (±2.6)1.5 (±2.5)2.3 (±3.0)1.2 (±2.3)5.2 (±2.4)
BQ 7: locus of control BL/1 m/3 m (SD)5.0 (±2.8)5.2 (±3.0)4.0 (±2.4)5.0 (±3.0)4.5 (±1.7)
2.8 (±3.3)2.5 (±3.3)3.9 (±3.4)2.6 (±3.3)5.0 (±2.9)
2.2 (±2.9)1.6 (±2.3)4.2 (±4.0)1.6 (±2.6)5.7 (±2.5)
BQ Bournemouth questionnaire

BL baseline

f female

m male

SD standard deviation

1 m 1 month

3 m 3 months