Group 1 NRS = 0–2 n = 154 | Group 2 NRS = 3–5 n = 753 | Group 3 NRS = 6–8 n = 1766 | Group 4 NRS = 9–10 n = 528 | p-value | |
---|---|---|---|---|---|
Age Mean (SD) | 62.5 (12.0) | 63.0 (11.5) | 62.8 (11.0) | 64.8 (12.0) | p < 0.05a |
Sex % men | 62.3 | 61.2 | 49.6 | 30.9 | p < 0.05b |
Smoke % | 22.2 | 23.7 | 27.7 | 29.8 | p < 0.05b |
BMI Mean (SD) | 27.3 (4.2) | 27.2 (4.2) | 27.3 (4.3) | 26.8 (4.4) | p = 0.27a |
ODI-score Mean (SD) | 25.9 (15.2) | 31.3 (12.3) | 39.3 (13.2) | 52.5 (15.1) | p < 0.05a |
Back-pain (NRS) Mean (SD) | 3.6 (2.7) | 4.8 (1.8) | 6.6 (1.7) | 8.5 (1.9) | p < 0.05a |
EQ-5D-score Mean (SD) | 0.60 (0.28) | 0.55 (0.25) | 0.36 (0.31) | 0.12 (0.26) | p < 0.05a |
Number of levels Mean (SD) | 1.4 (0.7) | 1.3 (0.6) | 1.8 (0.6) | 1.3 (0.5) | p = 0.07a |