Clinical efficacy of percutaneous endoscopic posterior lumbar interbody fusion and modified posterior lumbar interbody fusion in the treatment of lumbar degenerative disease

Table 3 Clinical outcomes of patients in PE-PLIF group and MPLIF group before and after operation

Indictor	PE-PLIF	MPLIF	P
VAS (leg pain)
Pre-operative	7 (7, 8)	8 (7, 9)	0.106
Post-operative 3 days	1 (0, 2)**††	1 (1, 1)**††	0.711
Post-operative 1 week	0 (0, 0)**††	0 (0, 1)**††	0.080
Post-operative 1 month	0 (0, 0) **	0 (0, 0) **	0.645
Post-operative 6 months	0 (0, 0) **	0 (0, 0) **	0.747
Last follow-up	0 (0, 0) **	0 (0, 0) **	1.000
VAS (low back pain)
Pre-operative	3 (1.5, 7)	3 (2.75, 5)	0.865
Post-operative 3 days	0 (0, 2) *†	3 (2, 4.25)	< 0.001
Post-operative 1 week	0 (0, 0) **	2 (1.75, 2)*†	< 0.001
Post-operative 1 month	0 (0, 0) **	0 (0, 0)**††	0.375
Post-operative 6 months	0 (0, 0) **	0 (0, 0) **	0.561
Last follow-up	0 (0, 0) **	0 (0, 0) **	0.747
JOA
Pre-operative	8 (6.5, 9)	8 (8, 9)	0.174
Post-operative 3 days	27 (24.5, 29)**††	20 (19, 22)*†	< 0.001
Post-operative 1 week	27 (25.5, 29) **	28 (25, 29)**††	0.891
Post-operative 1 month	28 (27, 29) **	28 (27, 29) **	0.835
Post-operative 6 months	28 (28, 29) **	29 (28, 29) **	0.424
Last follow-up	29 (28, 29) **	29 (28, 29) **	0.215
ODI
Pre-operative	16 (8, 35.5)	18.5 (14, 24.75)	0.617
Post-operative 3 days	0 (0, 9)*†	16 (11, 24.25)	< 0.001
Post-operative 1 week	0 (0, 0) **	8 (4, 10)**††	< 0.001
Post-operative 1 month	0 (0, 0) **	0 (0, 0)**††	0.369
Post-operative 6 months	0 (0, 0) **	0 (0, 0) **	0.539
Last follow-up	0 (0, 0) **	0 (0, 0) **	0.759

Compared with the group before surgery, *P < 0.05, **P < 0.01
Compared with the previous follow-up time point, †P < 0.05, ††P < 0.01
VAS Visual analogue scale, JOA Japanese Orthopaedic Association, ODI Oswestry Disability Index

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