From: Minimally invasive unilateral versus bilateral technique in performing single-segment pedicle screw fixation and lumbar interbody fusion
BPS
UPS
p value
Operation time (min)
103.6 ± 10.6
84.7 ± 6.4
<0.0001
Blood loss (ml)
137.4 ± 32.9
96.3 ± 17.5
Hospital stay (days)
10.4 ± 2.4
10.0 ± 2.1
0.428
Fusion
6 months
38/42
30/36
0.868
12 months
42/42
36/36
1