Neutral hip position for the oblique lumbar interbody fusion (OLIF) approach increases the retroperitoneal oblique corridor

Table 1 Retroperitoneal oblique corridor (ROC) according to lumbar levels (mm)

	ROC_S	ROC_HF	ROC_HN	p value
L2/3	14.8 ± 1.3	13.0 ± 0.9	16.8 ± 1.4	0.021*
L3/4	14.3 ± 2.2	13.1 ± 1.3	16.2 ± 0.9	0.036*
L4/5	13.5 ± 1.3	12.8 ± 1.8	15.4 ± 1.0	0.019*

* indicates p < 0.05, statistical significance
ROC_S retroperitoneal oblique corridor in supine
ROC_HF retroperitoneal oblique corridor in right lateral decubitus with hip flexion
ROC_HN retroperitoneal oblique corridor in right lateral decubitus with hip in neutral
There were statistical differences between ROC_HN compared to the ROC_S, and ROC_HF at all levels (p < 0.05) but no significant difference of ROC between all levels (p = 0.22).

ISSN: 1471-2474