Comparison of Endoscope-Assisted and Microscope-Assisted Tubular Surgery for Lumbar Laminectomies and Discectomies: Minimum 2-Year Follow-Up Results

Table 3

Treatment effects (ODI and JOA).

	Group A	Group B	Group C	Group D
Initial ODI, mean (SD), %	53.95(17.46)	53.85(10.22)	49.42(17.56)	59.08(19.84)
104-week ODI, mean (SD), %	18.44(15.22)	11.18(15.15)	9.99(12.7)	11.72(11.69)
Initial JOA, mean (SD)	13.66(6.68)	13.30(5.45)	13.88(5.40)	11.37(6.72)
104-week JOA, mean (SD)	22.49(6.34)	25.62(4.03)	26.29(3.23)	26.29(2.91)
JOA recovery rate, mean (SD), %	51.19(44.89)	73.40(41.04)	80.83(25.16%)	81.60(21.42)

Oswestry Disability Index (ODI) scores and Japanese Orthopaedic Association (JOA) scores at admission and 104 weeks postoperatively in the 4 groups. The lowest ODI score corresponds to the best functional state. The JOA recovery rate was calculated according to the following formula: (104-week follow-up score - preoperative JOA score)/(29 - preoperative JOA score) × 100%. P<0.05 in JOA recovery rate (group A vs. group B).