Table 3:

Operative Procedures Conducted on Selected Cohort, Stratified by Spinal Region

VARIABLE	N (% of Cohort)
Population	3,768 (100.0%)
Cervical
ACDF, 1 level	85 (3.2%)
ACDF, 2–3 level	441 (11.7%)
ACDF, 4 level	35 (0.9%)
Laminoforaminotomy	102 (2.7%)
Laminectomy/Laminoplasty	257 (6.8%)
Cervical fusion (posterior or anterior/posterior), 1–3 Level	237 (6.3%)
Cervical fusion (posterior or anterior/posterior), 4–6 Level	206 (5.5%)
Lumbar
Decompression, 1–2 level	885 (23.5%)
Decompression, 3–4 level	73 (1.9%)
Fusion (posterior or anterior/posterior), 1–4 level	883 (23.4%)
Thoracolumbar
Fusion (posterior or anterior/posterior), 4–6 level	133 (3.5%)
Fusion (posterior or anterior/posterior), 7–12 level	220 (5.8%)
Fusion (posterior or anterior/posterior), >12 level	121 (3.2%)

^*ACDF = Anterior Cervical Discectomy and Fusion