PMID- 35000341 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220122 IS - 2586-6583 (Print) IS - 2586-6591 (Electronic) IS - 2586-6591 (Linking) VI - 18 IP - 4 DP - 2021 Dec TI - Outcomes of Transforaminal Lumbar Interbody Fusion Using Unilateral Versus Bilateral Interbody Cages. PG - 854-862 LID - 10.14245/ns.2142248.124 [doi] AB - OBJECTIVE: To assess the impact of bilateral versus unilateral interbody cages on outcomes for minimally invasive transforaminal lumbar interbody fusion (MIS TLIF) procedures. METHODS: A retrospective review for primary, elective, single-level MIS TLIF procedures with bilateral posterior instrumentation from 2008-2020 was performed. Patients were grouped according to unilateral or bilateral interbody cage use. Procedures performed without static interbody cages or indicated for trauma, infection, malignancy were excluded. Patient-reported outcomes (PROs) included visual analogue scale (VAS), Oswestry Disability Index, 12-item Short Form health survey physical composite score (SF-12 PCS), PatientReported Outcome Measurement Information System physical function (PROMIS-PF). PROs were collected preoperatively and postoperatively. Change in PROs (Delta) was calculated and compared between groups. Achievement of minimum clinically important difference (MCID) was calculated using established values from the literature. Achievement rates were compared between groups using logistic regression. RESULTS: The study included 151 patients, with 111 unilateral and 40 bilateral cage placements. Charlson Comorbidity Index, diabetes, and insurance status differed between groups (p < 0.050). Prevalence of degenerative and isthmic spondylolisthesis (both p