| Preoperative | 6 months | 2 years |
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OPEN-TLIF BP | 6.5 ± 2.53 | 1.7 ± 1.33 | 1.2 ± 0.71 |
MMI-TLIF BP | 6.1 ± 2.19 | 1.8 ± 1.38 | 1.0 ± 0.93 |
OPEN-TLIF LP | 6.5 ± 1.88 | 2.1 ± 1.05 | 1.1 ± 0.86 |
MMI-TLIF LP | 7.2 ± 1.92 | 2.1 ± 1.45 | 1.0 ± 0.76 |
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BP back pain, LP leg pain, MMI-TLIF modified minimally invasive transforaminal lumbar interbody fusion, Open-TLIF open transforaminal lumbar interbody fusion
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P < 0.01 when preoperation compared to 6 months and 2 years, respectively, in both MMI-TLIF and open-TLIF groups of BP and LP
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P > 0.05 when 6 months compared to 2 years in open-TLIF group of BP
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P < 0.05 when 6 months compared to 2 years in MMI-TLIF group of BP
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P < 0.01 when 6 months compared to 2 years in both open-TLIP and MMI-TLIF groups of LP
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P > 0.05 when open-TLIF compared to MMI-TLIF in preoperation, 6 months and 2 years of BP and LP