Table 1.
Patient characteristics by group and differences between groups
| Patient characteristic | MVD group (n = 181) | PSR group (n = 49) | Test, p value |
|---|---|---|---|
| Mean age in years (± SD) | 59.3 (± 11.6) | 56.9 (± 12.2) | t = 1.24 n.s. |
| Gender: female (%) | 108 (57.9) | 34 (69.4) | χ2 = 1.54 n.s. |
| Other co-morbidities (%) | 78 (43.1) | 16 (32.7) | χ2 = 1.74 n.s. |
| Median duration of symptoms in years (IQR) | 5.0 (2.5–8.0) | 4.0 (2.0–9.0) |
U = 2,802.0 n.s. |
| Side of pain (%): right, left | 116/172 (67.4), 56/172 (32.6) | 27 (55.1), 22 (44.9) | χ2 = 2.54 n.s. |
| Division affected (%) | χ2 = 23.7 p = 0.001 |
||
| V1 | 11/164 (6.7) | 0/46 (0.0) | |
| V2 | 20/164 (12.2) | 10/46 (21.7) | |
| V3 | 36/164 (22.0) | 10/46 (21.7) | |
| V1 + V2 | 27/164 (16.5) | 0/46 (0.0) | |
| V2 + V3 | 13/164 (7.9) | 1/46 (2.2) | |
| V1 + V2 + V3 | 57/164 (34.8) | 25/46 (54.3) | |
| Currently taking medication for pain (%) | 14/180 (7.8) | 11/49 (22.4) | χ2 = 8.52 p = 0.004 |
| Occasional use | 2/14 (14.2) | 2/10 (20.0) | |
| Once daily use | 9/14 (64.3) | 6/10 (60.0) | |
| Use twice daily or more | 3/14 (21.4) | 2/10 (20.0) |