Results from short-, medium- and long-term follow-up

Follow-Up and Patients	Outcome with O2-O3			Outcome with Steroid
	Excellent	Good	Poor	Excellent	Good	Poor
Short term
With disk disease (n = 166)	73 (84.8%)	8 (9.3%)	5 (5.9%)	64 (80%)	10 (12.5%)	8 (10%)
Without disk disease (n = 160)	56 (80%)	11 (15.7%)	3 (4.3%)	55 (78.5%)	9 (12.8%)	5 (7.2%)
Medium term
With disk disease (n = 166)	67 (77.9%)	9 (10.5%)	10 (11.6%)	54 (67.5%)	14 (17.5%)	12 (15%)
Without disk disease (n = 160)	55 (78.5%)	9 (12.9%)	6 (8.6%)	49 (70%)	10 (14.2%)	11 (15.8%)
Long term
With disk disease (n = 166)	64 (74.4%)	9 (10.5%)	13 (15.1%)	46 (57.5%)	16 (20%)	18 (22.5%)
Without disk disease (n = 160)	53 (75.8%)	11 (15.7%)	6 (8.6%)	44 (62.8%)	11 (15.8%)	15 (21.4%)

Note.—Data in parentheses are percentages. Short term = 1 week, medium term = 3 months, and long term = 6 months.