Table 1.
Demographic subject characteristics and behavioural statistics data of chronic low back pain (cLBP) and healthy control (HC) subjects. The values presented are ‘mean (minimum–maximum)’ for age and ‘mean (standard deviation)’ for others.
| Characteristics | Cohort 1 |
Cohort 2 |
||
|---|---|---|---|---|
| cLBP (n=90) | HC (n=74) | cLBP (n=18) | HC (n=18) | |
| Age (yr) | 34.46 (20–50) | 32.44 (23–50) | 36.11 (23–49) | 37.11 (23–50) |
| Gender (male/female) | 38/52 | 31/43 | 7/11 | 6/12 |
| Pain duration (yr) | 6.94 (6.21) | NA | 5.27 (3.66) | NA |
| Pain bothersomeness∗ | 5.06 (1.88) | NA | NA | NA |
| BDI | 6.12 (6.00) | NA | NA | NA |
| Pain intensity (low/high pain condition)† | 31.34 (18.70)/55.23 (19.56) | NA | NA | NA |
∗
Pain bothersomeness: low back pain bothersomeness during the past week.
†
Pain intensity of 76 cLBP subjects whose pain intensity increased in the post-maneuver scan; the pain intensity of patients in the high pain condition was significantly higher than that of patients in the low pain condition (P<0.001). BDI, Beck Depression Inventory.