Table 5: Injuries observed in the study. X2 analysis to test H0: There is not statistically significant difference between extrusion, protrusion or bulge 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 2 as degrees of freedom (v).
| Treatment success | |||||||
| Injury | Yes n (%) | No n (%) | Total | P value | X2 calculated | X2 table | H0 |
| Extrusion | 163 (10.6%) | 41 (2.7%) | 204 (13.2%) | 0.1571 | 3.7010 | 5.9915 | Accepted |
| Protrusion | 574 (37.2%) | 202 (13.1%) | 776 (50.4%) | ||||
| Bulge | 411 (26.7%) | 150 (9.7%) | 561 (36.4%) | ||||
| Total | 1148 (74.5%) | 393 (25.5%) | 1,541 (100%) | ||||