Table 1 Demographic characteristics and clinical data of 45 patients with lumbar spinal stenosis (LSS)
Characteristics |  | Men n = 20 (%) | Women n = 25 (%) | P | Total N = 45 (%) |
|---|---|---|---|---|---|
Age (yrs) | mean ± S.D. | 59.90 ± 9.60 | 62.80 ± 7.22 | 0.192 | 61.51 ± 8.38 |
BMI (kg/m2) | mean ± S.D. | 22.70 ± 2.82 | 22.11 ± 2.94 | 0.385 | 22.37 ± 2.87 |
Spinal instability | Â | Â | Â | 1 | Â |
| Â | Yes | 4 (20.0) | 6 (24.0) | Â | 10 (22.2) |
No | 16 (80.0) | 19 (76.0) | Â | 35 (77.8) | |
Revision surgery | Â | Â | Â | Â | Â |
| Â | Yes | 4 (20.0) | 4 (16.0) | 1 | 8 (17.8) |
No | 16 (80.0) | 21 (84.0) | Â | 37 (82.2) | |
Type of spinal stenosis | Â | Â | Â | 0.104 | Â |
| Â | Foraminal stenosis | 2 (10.0) | 8 (32.0) | Â | 10 (22.2) |
Lateral recess stenosis | 13 (65.0) | 9 (36.0) | Â | 22 (48.9) | |
Central stenosis | 5 (25.0) | 8 (32.0) | Â | 13 (28.9) | |
Stenosis grade | Â | Â | Â | 0.611 | Â |
| Â | Mild | 5 (25.0) | 9 (36.0) | Â | 14 (31.1) |
Moderate | 10 (50.0) | 9 (36.0) | Â | 19 (42.2) | |
Severe | 5 (25.0) | 7 (28.0) | Â | 12 (26.7) | |
Coexisting disease | Â | Â | Â | Â | Â |
| Â | LSS alone | 8 (40.0) | 12 (48.0) | 0.764 | 20 (44.4) |
Hypertension | 5 (25.0) | 10 (40.0) | 0.352 | 15 (33.3) | |
Diabetes | 5 (25.0) | 2 (8.0) | 0.214 | 7 (15.6) | |
Rheumatoid arthritis | 0 (0) | 2 (8.0) | 0.495 | 2 (4.4) | |
Coronary heart disease | 4 (20.0) | 4 (16.0) | 1 | 8 (17.8) | |
Osteoarthritis | 4 (20.0) | 1 (4.0) | 0.155 | 5 (11.1) | |
Level of decompressed disc | Â | Â | Â | 0.017 | Â |
|  | L3–4 | 4 (20.0) | 0 (0) |  | 4 (8.9) |
L4–5 | 6 (30.0) | 16 (64.0) |  | 22 (48.9) | |
L5-S1 | 10 (50.0) | 9 (36.0) | Â | 19 (42.2) | |
Complication | Transient dysesthesia | 1 (5.0) | 1 (4.0) | 1 | 2 (4.4) |
Recurrent stenosis | Â | Â | Â | 0.383 | Â |
| Â | Yes | 4 (20.0) | 2(8.0) | Â | 6(13.3) |
No | 16(80.0) | 23(92.0) | Â | 39(86.7) | |
Preoperative | |||||
 VAS-back | mean ± S.D. | 6.92 ± 1.30 | 6.52 ± 1.00 | 0.153 | 6.7 ± 1.15 |
 VAS-leg | mean ± S.D. | 7.18 ± 0.82 | 6.88 ± 0.85 | 0.265 | 7.01 ± 0.84 |
 ODI scores (%) | mean ± S.D. | 47.70 ± 10.31 | 44.96 ± 9.99 | 0.403 | 46.18 ± 10.17 |
Postoperative 1 yr | |||||
 VAS-back | mean ± S.D. | 2.72 ± 1.15 | 2.46 ± 1.08 | 0.464 | 2.58 ± 1.11 |
 VAS-leg | mean ± S.D. | 2.60 ± 1.50 | 2.02 ± 1.35 | 0.243 | 2.28 ± 1.43 |
 ODI scores (%) | mean ± S.D. | 14.80 ± 9.48 | 14.08 ± 9.86 | 0.764 | 14.40 ± 9.59 |