TABLE 1. Preoperative Comparison of Laminoplasty and Laminectomy Patients.

	Laminoplasty	Laminectomy
Age (yrs.)	53.5 (41-75)	54.3 (33-73)
Length of Follow-up (mos.)	65.4 (36-112)	64.8 (53-76)
Female/Total	2/20	3/22
Avg. # Operative Levels	4.3 (3-5)	4.6 (3-6)
SAC (mm)	14.1 (10-17)	15.2 (13-18)
Pavlov ratio	.64 (.46-.75)	.71 (.54-1.09)

SAC= Space Available for the Cord