Table 1.
Demographics and clinical data before surgery for lumbar disc herniation
| Male (N = 60) | Female (N = 38) | Difference between the gender, P value | |
|---|---|---|---|
| Age (years), mean (SD) | 45 (12) | 43 (14) | 0.55 |
| Body mass index, mean (SD) | 26 (4) | 26 (4) | 0.63 |
| Back pain | |||
| Duration, mean (SD) | 16 (24) | 15 (24) | 0.76 |
| Intensity; VAS, mean (SD) | |||
| Pre-operatively | 55 (31) | 73 (23) | 0.003 |
| 6 week post-operatively | 18 (25) | 13 (17) | 0.24 |
| 1 year post-operatively | 31 (32) | 21 (23) | 0.11 |
| Leg pain | |||
| Duration, mean (SD) | 10 (14) | 9 (11) | 0.53 |
| Intensity, VAS, mean (SD) | |||
| Pre-operatively | 72 (23) | 77 (19) | 0.23 |
| 6 wk post-operatively | 24 (28) | 21 (26) | 0.67 |
| 1 year post-operatively | 30 (35) | 19 (22) | 0.78 |
| Level of the operation | |||
| L3–4 | 2 | 4 | |
| L4–5 | 32 | 22 | |
| L5–S1 | 25 | 12 | |
| L4–L5 and L5–S1 | 1 | – | |
| Site of the operation | |||
| Right | 25 | 14 | |
| Left | 31 | 20 | |
| Central | 4 | 4 | |