Table 1 Sociodemographic and clinical characteristics of the patients at the time of their first operation for lumbar disc herniation.
Single operated N = 149 | Re-operated N = 17 | P-value | |
|---|---|---|---|
Number of males | 86 (58) | 8 (47) | 0.40 |
Age, years, mean (SD) | 42 (12) | 41 (14) | 0.70 |
Height, cm, mean (SD) | 173 (9) | 172 (8) | 0.61 |
Body mass index, mean (SD) | 26 (4) | 26 (3) | 0.76 |
Duration of back pain, months, median (IQR) | 10 (3, 24) | 12 (6, 117) | 0.11 |
Duration of leg pain, months, median (IQR) | 6 (3, 14) | 10 (3, 15) | 0.19 |
Intensity of pain before operation, VAS, median (IQR) | |||
Back pain | 59 (34, 82) | 76 (50, 86) | 0.070 |
Leg pain | 74 (58, 90) | 76 (61, 94) | 0.45 |
Leisure time physical activity, h/week, median (IQR) | 3.5 (1.0, 6.8) | 5.5 (2.9, 7.5) | 0.29 |
Employment status, no (%): | 0.48 | ||
Employed | 109 (73.2) | 12 (70.6) | |
Unemployed | 10 (6.7) | 3 (17.6) | |
Student | 8 (5.4) | 1 (5.9) | |
Retired | 18 (12.1) | 1 (5.9) | |
Other | 4 (2.7) | - |