Table 1:

Medium-term follow-up in patients with and without disk disease as a function of treatment type

Treatment Group	Outcome
Treatment Group	Excellent	Good	Poor	Total
Patients with disk disease
O₂–O₃	67	9	10	86
Steroid	54	14	12	80
Total	121	23	22	166 χ² = 2.42
Patients without disk disease
O₂–O₃	55	9	6	70
Steroid	49	10	11	70
Total	104	19	17	140 χ² = 1.86