Table 2: Major outcomes of the cervical surgical approaches from anterior to posterior to anterior-posterior.

Authors Study design              No. Patients  Procedures Significant Outcomes  
Badhiwala, et al.                    [32]                                                                                                                           Retrospective databasea    N = 1298 3-level ACDF, hybrid corpectomy, major complication compared to a 3-level ACDF, (aOR 2.82, p = 0.005)   -Among all 3 procedures, no difference in 30-day or mortality rate, reoperation, or readmission -Level ACCF was associated with a higher risk of discectomy -Multiple discectomies and hybrid procedures had comparable safety profiles -Multiple corpectomies associated with higher complications and longer hospital stay    
Lee CH, et al.  [38] Meta-analysis         (7 studies) N = 592 Expansive -No superiority over one approach laminoplasty, or laminectomy + on JOA grade and VAS score fusion. -Even loss of cervical lordosis in both groups      
           
           
Lau D, et al. [49] Retrospective cohort N = 145 Laminoplasty, or LPSP                -Pain outcomes were similar between both groups in patients with similar post-op cervical lordosis and sagittal alignment -Better pain outcomes in laminoplasty pts. With greater cervical lordosis (> 20°) -LPSP associated with higher long-term complication rate, but better neurological outcomes compared to laminoplasty  
  Retrospective   N = 72 Single stage anterior- posterior- or posterior-anterior-posterior Within 90 days following surgery: -30.6% major complications (eg, death, stroke) -80.6% minor complications (eg, PE, dysphagia) -13.9% reoperation rate  
Wewel JT,   et al. [53]                                     
           
Veeravagu, et al. [51]                            Retrospective N = 35,962 ACDF, posterior fusion, laminoplasty, anterior- posterior Within 30 days after surgical discharge date -ACDF, posterior fusion, laminoplasty, and anterior- posterior had complication rates of 15.6%, 29.2%, 22.4%, 41.1%, respectively -Dysphagia rate of 4.1%, 1.6%, 0.35%, and 11.3% for ACDF, posterior fusion, laminoplasty, and anterior-posterior, respectively  
Fehlings MG, et al. [50]                  Prospective multicenter N = 302 Anterior-only, posterior-only, or anterior-posterior          -Anterior-only, posterior-only, and 2-stage anterior-posterior had complication rates of 11%, 19%, and 37%, respectively -Dysphagia rate of 2.3%, 0.9%, and 21.1% for anterior-only, posterior-only, and combined approach, respectively  
           
Smith JS, et al. [52] Prospective multicenter N = 78   Anterior-only, posterior-only, or anterior-posterior     -Anterior-only, posterior-only, and anterior-posterior had early complication rates of 27.3%, -Dysphagia rate of 8.1%, 2.6%, and 24.1% for anterior-only, posterior-only, and combined                                                     approach, respectively  

a: Database was acquired from the national surgical quality improvement program (NSQIP) of the American college of surgeons (ACS); ACDF:  Anterior cervical discectomy and fusion; ACCF: Anterior cervical corpectomy and fusion; aOR: Adjusted odds ratio; JOA: Japanese orthopaedic association; VAS: Visual analog scale; LPSP: Laminectomy with posterior spinal fusion; post-op: Post-operative; pts: Patients; PE: Pulmonary embolism.