Table 6: Damaged discs observed in the study. X2 analysis to test H0: There is not statistically significant difference between cervical (C), thoracic (T) or lumbar (L) discs in those patients who received treatment (physical therapy, ozone and intravenous injections) to reduce the low back pain at a significance level of P < 0.05 using 16 as degrees of freedom (v).

Treatment success
Disc Yes n (%) No n (%) Total P value X2 calculated X2 table H0
C2 64 (4.2%) 24 (1.6%) 88 (5.7%) 0.6622 13.1438 26.2962 Accepted
C3 24 (1.6%) 9 (0.6%) 33 (2.1%)
C4 37 (2.4%) 22 (1.4%) 59 (3.8%)
C5 23 (1.5%) 5 (0.3%) 28 (1.8%)
C6 1 (0.06%) 0 (0%) 1 (0.06%)
T1 37 (2.4%) 12 (0.8%) 49 (3.2%)
T2 28 (1.8%) 10 (0.6%) 38 (2.5%)
T3 12 (0.8%) 3 (0.2%) 15 (1%)
T4 9 (0.6%) 0 (0%) 9 (0.6%)
T5 1 (0.06%) 0 (0%) 1 (0.06%)
T6 2 (0.1%) 1 (0.06%) 3 (0.2%)
T7 1 (0.06%) 0 (0%) 1 (0.06%)
L1 65 (4.2%) 30 (1.9%) 95 (6.2%)
L2 68 (4.4%) 20 (1.3%) 88 (5.7%)
L3 137 (8.9%) 52 (3.4%) 189 (12.3%)
L4 348 (22.6%) 113 (7.3%) 461 (29.9%)
L5 291 (18.9%) 92 (5.9%) 383 (24.9%)
Total 1,148 (74.5%) 393 (25.5%) 1,541 (100%)