| Rocker group | X-Stop group | p value |
---|---|---|---|
Number | 28 | 27 | Â |
Mean age (range),years | 62.1(52–78) | 60.5(50–74) | 0.848a |
Gender(Male/Female) | 13/15 | 15/12 | 0.498b |
BMI ≥ 30 | 6 | 4 | 0.729c |
Current smokers | 7 | 7 | 0.937b |
Surgical level | Â | Â | 0.700b |
 L3/4 | 7 | 8 |  |
 L4/5 | 21 | 19 |  |
Surgical procedure | Â | Â | 0.432b |
 Simple distraction | 10 | 7 |  |
 Unilateral decompression | 18 | 20 |  |