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Table 2 Relative psoas cross-sectional area (PCA) according to lumbar levels (mm2)

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

  PCAS PCAHF PCAHN
L2/3 572.6 ± 28.9 584.8 ± 42.6 530.6 ± 32.1*
L3/4 917.3 ± 34.2 964.6 ± 32.5 870.9 ± 21.9*
L4/5 1180.9 ± 33.7 1123.2 ± 22.7 1065.6 ± 42.2*
  1. * indicates p < 0.05
  2. PCAS relative psoas cross-sectional area in supine
  3. PCAHF relative psoas cross-sectional area in right lateral decubitus with hip flexion
  4. PCAHN relative psoas cross-sectional area in right lateral decubitus with hip in neutral
  5. There were statistical differences between PCAHN compared to the PCAS and PCAHF at all levels (p < 0.05).