Efficacy and safety of a modified lateral lumbar interbody fusion in L4-5 lumbar degenerative diseases compared with traditional XLIF and OLIF: a retrospective cohort study of 156 cases

Table 2 The condition of iliac crest and psoas major of group XLIF, OLIF and XOLIF

	XLIF	OLIF	XOLIF	P (2-tailed)
Number of cases	51	56	49
Stenosis between psoas muscle and artery	6 (11.8%)_a	0 (0%)_b	9 (18.4%)_a	0.001^&
Psoas major muscle hypertrophy	7 (13.7%)_a	8 (14.3%)_a	12 (24.5%)_a	0.275^&
Psoas major muscle elevation	4 (7.8%)_a	0 (0%)_b	8 (16.3%)_a	0.001^&
High iliac crest	0(0%)_a	7 (12.5%)_b	9 (18.4%)_b	0.008^&

XLIF indicated extreme lateral interbody fusion, OLIF oblique lumbar interbody fusion; ^&, Pearson Chi-square test; Multiple comparisons were used bonferroni method, and at least one identical subscript letter denotes do not differ significantly from each other

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