Table 3: Patients who participated in the study classified by age. X2 analysis to test H0: There is not statistically significant difference between age range of 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 7 as degrees of freedom (v).
| Treatment success | |||||||
| Age range | Yes n (%) | No n (%) | Total | P value | X2 calculated | X2 table | H0 |
| 11 to 20 | 10 (1%) | 3 (0.3%) | 13 (1.3%) | 0.3194 | 8.1508 | 14.0671 | Accepted |
| 21 to 30 | 68 (6.8%) | 18 (1.8%) | 86 (8.6%) | ||||
| 31 to 40 | 94 (9.4%) | 32 (3.2%) | 126 (12.6%) | ||||
| 41 to 50 | 114 (11.4%) | 37 (3.7%) | 151 (15.1%) | ||||
| 51 to 60 | 129 (12.9%) | 55 (5.5%) | 184 (18.4%) | ||||
| 61 to 70 | 205 (20.5%) | 67 (6.7%) | 272 (27.2%) | ||||
| 71 to 80 | 87 (8.7%) | 46 (4.6%) | 133 (13.3%) | ||||
| 81 to 90 | 24 (2.4%) | 11 (1.1%) | 35 (3.5%) | ||||
| Total | 731 (73.1%) | 269 (26.9%) | 1,000 (100%) | ||||