Table 4 Classification in each of the psychosocial, spinal tissue and nervous system from clusters derived within each of the sub-domains.
Participant | Psychosocial classificationa | Spinal tissue classification | Nervous system classification | Overall classification | Domains contributing | Average 1-week pain intensity (0–100) | Oswestry Disability Index (0–100) |
|---|---|---|---|---|---|---|---|
1 | Normal psychosocial scores | Normal lumbar extension strength and T2 | Low lumbar pressure-pain threshold only | Low lumbar pressure-pain threshold only | Nervous system | 34 | 10 |
2 | High psychosocial scores | Low lumbar extension strength and T2 | High central sensitisation only | High psychosocial scores; Low lumbar extension strength and T2; High central sensitisation | Psychosocial; spinal tissue; nervous system | 47 | 36 |
3 | Normal psychosocial scores | Low lumbar extension strength and T2 | Normal central sensitisation and lumbar pressure-pain threshold | Low lumbar extension strength and T2 | Spinal tissue | 10 | 22 |
4 | High psychosocial scoress | Normal lumbar extension strength and T2 | High central sensitisation and low lumbar pressure-pain threshold | High psychosocial scores; High central sensitisation and low lumbar pressure-pain threshold | Psychosocial; nervous system | 33 | 16 |
5 | High psychosocial scores | Low lumbar extension strength and T2 | High central sensitisation and low lumbar pressure-pain threshold | High psychosocial scores; Low lumbar extension strength and T2; High central sensitisation and low lumbar pressure-pain threshold | Psychosocial; spinal tissue; nervous system | 73 | 50 |
6 | Normal psychosocial scores | Normal lumbar extension strength and T2 | High central sensitisation only | High central sensitisation only | Nervous system | 34 | 16 |
7 | Normal psychosocial scores | Low lumbar extension strength and T2 | High central sensitisation and low lumbar pressure-pain threshold | Low lumbar extension strength and T2; High central sensitisation and low lumbar pressure-pain threshold | Spinal tissue; nervous system | 62 | 46 |
8 | Normal psychosocial scores | Low lumbar extension strength and T2 | Normal central sensitisation and lumbar pressure-pain threshold | Low lumbar extension strength and T2 | Spinal tissue | 16 | 16 |
9 | Normal psychosocial scores | Low lumbar extension strength and T2 | Low lumbar pressure-pain threshold only | Low lumbar extension strength and T2; Low lumbar pressure-pain threshold only | Spinal tissue; nervous system | 39 | 22 |
10 | High psychosocial scores | Low lumbar extension strength and T2 | High central sensitisation only | High psychosocial scores; Low lumbar extension strength and T2; High central sensitisation | Psychosocial; spinal tissue; nervous system | 54 | 32 |
11 | Normal psychosocial scores | Low lumbar extension strength and T2 | Normal central sensitisation and lumbar pressure-pain threshold | Low lumbar extension strength and T2 | Spinal tissue | 25 | 14 |
12 | Normal psychosocial scores | Low lumbar extension strength and T2 | High central sensitisation only | Low lumbar extension strength and T2; High central sensitisation | Spinal tissue; nervous system | 51 | 30 |
13 | Normal psychosocial scores | Normal lumbar extension strength and T2 | High central sensitisation only | High central sensitisation only | Nervous system | 57 | 20 |
14 | Normal psychosocial scores | Normal lumbar extension strength and T2 | High central sensitisation only | High central sensitisation only | Nervous system | 12 | 6 |
15 | Normal psychosocial scores | Low lumbar extension strength and T2 | Normal central sensitisation and lumbar pressure-pain threshold | Low lumbar extension strength and T2 | Spinal tissue | 42 | 30 |
16 | Normal psychosocial scores | Normal lumbar extension strength and T2 | High central sensitisation only | High central sensitisation | Nervous system | 11 | 14 |
17 | High psychosocial scores | Normal lumbar extension strength and T2 | High central sensitisation only | High psychosocial scores; High central sensitisation | Psychosocial; nervous system | 53 | 22 |
18 | Normal psychosocial scores | Normal lumbar extension strength and T2 | Low lumbar pressure-pain threshold only | Low lumbar pressure-pain threshold | Nervous system | 36 | 22 |
19 | Normal psychosocial scores | Low lumbar extension strength and T2 | High central sensitisation and low lumbar pressure-pain threshold | Low lumbar extension strength and T2; High central sensitisation and low lumbar pressure-pain threshold | Spinal tissue; Nervous system | 45 | 18 |
20 | Normal psychosocial scores | Normal lumbar extension strength and T2 | High central sensitisation only | High central sensitisation only | Nervous system | 22 | 18 |
21 | Normal psychosocial scores | Normal lumbar extension strength and T2 | High central sensitisation only | High central sensitisation only | Nervous system | 50 | 20 |
