Lateral Lumbar Interbody Fusion: An Update on Motor Deficits in 1000 Patients Across Two Decades.

A previous trend toward improved neurological outcomes during the early era of LLIF (2006-2012) did not reach statistical significance at the time. 29 In our study, ≥2 MRC grade quadriceps paresis occurred in only 0.7% of patients, comparable to the 1.8% rate recently published in a multicenter study. 30 Our recent decade incidences of iliopsoas weakness (16.4% at discharge, 4.1% at 6 weeks, and 1.8% at 3 months) are consistent with those reported by Mundis et al., 23 , 31 who found 21.9% immediately postoperatively and 2.4% at 3 months.

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