Table 1.

Demographic and clinical information for the study cohort by surgical approach

	Anterior approach	Posterior approach	χ2/t	P
Male/female	36/32	25/34	1.414	0.235
Age (years)	37–62 (54.4 ± 12.8)	40–67 (57.9 ± 9.5)	1.727	0.086
Symptom duration (years)	0.2–16 (3.1 ± 1.5)	0.3–19 (3.7 ± 2.1)	1.870	0.064