From: Causes of lower extremity weaknesses after posterior lumbar spine fusion surgery and therapeutic effects of active surgical exploration
Causes of weakness
Average time after surgery (days)
P value▲
Internal fixation factors
3.4 ± 1.2
0.238
Epidural hematomas
1.4 ± 0.5
0.026*
Insufficient decompressions
2.6 ± 1.1
0.079
Nerve root edemas
4.8 ± 2.0