. 2012 Dec 20;5:597–608. doi: 10.2147/JPR.S38999

Table 2.

Therapeutic procedural characteristics with procedural frequency, average relief per procedure, and average total relief in weeks over a period of 1 year and 2 years

	Back pain		Leg pain

	Group I (n = 60)	Group II (n = 60)	Group I (n = 59)	Group II (n = 58)
Average number of procedures per year	2.2^* ± 1.08	3.5 ± 1.03	2.2^* ± 1.09	3.4 ± 1.03
Average number of procedures per 2 years	2.4^* ± 1.44	6.4 ± 2.35	2.4^* ± 1.45	6.4 ± 2.35
Average relief per procedure (weeks)	4.9^* ± 4.00	11.7 ± 2.97	5.1^* ± 3.90	11.5 ± 3.34
Average total relief per year (weeks)	13.2^* ± 14.20	40.7 ± 14.92	12.9^* ± 13.71	39.7 ± 15.87
Average total relief per 2 years (weeks)	14.8^* ± 19.77	78.5 ± 32.36	15.0^* ± 19.77	77.7 ± 33.07

Note:

Significant difference with Group II (P < 0.05).