Retrospective Study
Copyright ©The Author(s) 2022.
World J Clin Cases. Dec 16, 2022; 10(35): 12880-12889
Published online Dec 16, 2022. doi: 10.12998/wjcc.v10.i35.12880
Table 1 Comparison of baseline data between the midline lumbar fusion and minimally invasive transforaminal lumbar interbody fusion groups

MIDLF (n = 34)
MIS-TLIF (n = 29)
P value
Age (yr)62.94 ± 13.0358.76 ± 8.650.146
Gender (male/female) 14/2016/130.268
BMI (kg/cm2)25.82 ± 3.8126.06 ± 3.680.802
Main diagnosis
Lumbar spinal stenosis208
Lumbar disc herniation1119
Lumbar spondylolisthesis 32
Operation segment
L3-420
L4-52520
L5-S179
Operation duration (min)227.88 ± 35.53240.24 ± 38.470.190
Estimated blood loss (mL)400 (200-600) 300 (150-500)0.013a
Hospital stay time (d)7 (4-11)6 (3-11)0.085
Follow-up time (mo)15.65 ± 2.6515.31 ± 1.850.568
Table 2 Sagittal lumbar-pelvic parameters of the midline lumbar fusion and minimally invasive transforaminal lumbar interbody fusion groups

MIDLF (n = 34)
MIS-TLIF (n = 29)
P value
LL
Preoperative35.74 ± 14.7735.17 ± 13.500.875
Final follow-up41.45 ± 12.8341.21 ± 12.110.940
ΔLL5.48 (-14.13, 33.86)5.34 (-14.35, 33.85)0.772
P value (pre-final)0.005a0.002a
Lower LL
Preoperative23.21 ± 9.6522.21 ± 9.900.688
Final follow-up27.57 ± 8.0026.49 ± 8.740.609
ΔLower LL4.24 (-11.43, 24.02)4.27 ± 7.190.472
P value (pre-final)0.001a0.003a
L4S
Preoperative3.79 ± 8.034.81 ± 7.700.611
Final follow-up2.65 ± 8.694.14 ± 8.350.492
ΔL4S-1.06 (-13.06, 12.83)-0.63 (-12.74, 13.22)0.180
P value (pre-final)0.029a0.157
L5S
Preoperative11.42 ± 7.6312.74 ± 7.530.494
Final follow-up11.16 ± 9.0414.44 ± 14.780.284
ΔL5S-0.27 (-10.97, 25.62)2.58 (-16.20, 41.31)0.562
P value (pre-final)0.2040.673
L5I
Preoperative21.99 (8.01-55.98)23.26 (12.15-56.93)0.270
Final follow-up19.67 (9.21-44.23)22.62 ± 9.910.440
ΔL5I-2.08 (15.33-22.47)-2.65 (-15.77, 21.61)0.184
P value (pre-final)0.02a0.001a
LASD
Preoperative9.04 ± 23.1114.24 ± 22.700.374
Final follow-up2.80 ± 20.124.26 ± 20.850.779
ΔLASD-6.23 (-47.71, 32.43)-7.91 (-49.24, 30.84)0.038a
P value (pre-final)0.002a0.000a
PI
Preoperative46.73 ± 10.4349.15 ± 10.810.369
Final follow-up46.49 ± 11.3850.21 ± 13.260.189
ΔPI-0.94 (-7.93, 38.08)0.49 (-8.15, 38.13)0.319
P value (pre-final)0.0620.754
PT
Preoperative18.92 (7.45, 40.71)21.14 ± 7.950.241
Final follow-up18.54 ± 7.7321.14 ± 8.040.846
ΔPT-1.56 (18.10-15.89)-1.03 ± 6.220.673
P value (pre-final)0.014a0.379
SS
Preoperative26.32 ± 8.5226.98 ± 8.160.754
Final follow-up28.92 ± 9.9229.39 ± 9.020.196
ΔSS2.60 (-13.78, 30.10)2.65 (-11.60, 30.63)0.847
P value (pre-final)0.008a0.098
PI-LL
Preoperative10.99 ± 13.6013.98 ± 13.460.385
Final follow-up4.33 ± 11.878.99 ± 11.240.117
ΔPI-LL-6.65 ± 10.19-4.53 (-28.71, 29.39)0.453
P value (pre-final)0.001a0.001a
Table 3 Clinical outcomes of the midline lumbar fusion and minimally invasive transforaminal lumbar interbody fusion groups before and after surgery

MIDLF (n = 34)
MIS-TLIF (n = 29)
P value
Back pain VAS score
Preoperative6.00 (0.00-8.00)6.00 (0.00-9.00)0.788
3 mo postoperation2.00 (0.00-5.00)1.00 (0.00-4.00)0.028a
Final follow-up1.00 (0.00-5.00)1.00 (0.00-3.00)0.928
Leg pain VAS score
Preoperative7.00 (0.00-9.00)8.00 (2.00-10.00)0.039a
3 mo postoperation2.00 (0.00-3.00)1.00 (0.00-3.00)0.270
Final follow-up1.00 (0.00-2.00)0.00 (0.00-5.00)0.107
ODI score
Preoperative63.50 ± 13.3366.86 ± 14.610.343
3 mo postoperation23.47 ± 5.6620.21 ± 6.830.042a
Final follow-up14.12 ± 6.1013.28 ± 4.130.531