Measures of cross sectional area (mm2) in each of the muscle groups considered
| No LBP | Current LBP | Previous LBP | |
|---|---|---|---|
| All measurements are mean (SD). | |||
| LBP, Low back pain. | |||
| Multifidus L4 | |||
| Left | 226.3 (35.0) | 352.4 (108.8) | 422.2 (196.60 |
| Right | 235.5 (48.7) | 371.0 (104.1) | 426.3 (186.3) |
| Multifidus L5 | |||
| Left | 271.8 (70.5) | 371.4 (127.8) | 425.7±197.6) |
| Right | 277.5 (87.5) | 362.4 (101.6) | 428.0 (218.0) |
| Erector spinae L4 | |||
| Left | 745.0 (213.9) | 889.4 (105.8) | 931.6 (399.1) |
| Right | 751.3 (205.0) | 915.4 (181.9) | 889.2 (459.3) |
| Erector spinae L5 | |||
| Left | 507.5 (178.1) | 500.6 (258.1) | 484.7 (255.7) |
| Right | 545.0 (153.6) | 515.8 (224.7) | 440.1 (209.4) |
| Iliopsoas | |||
| Left | 993.3 (254.8) | 1347.8 (457.2) | 1343.9 (345.9) |
| Right | 916.3 (207.0) | 1348.8 (399.0) | 1398 (407) |