Table 4: Patients who participated in the study classified by body mass index (BMI). X2 analysis to test H0: There is not statistically significant difference between BMI 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 | |||||||
| Body mass index | Yes n (%) | No n (%) | Total | P value | X2 calculated | X2 table | H0 |
| Severe thinness | 1 (0.1%) | 1 (0.1%) | 2 (0.2%) | 0.0240 | 16.1230 | 14.0671 | Rejected |
| Moderate thinness | 2 (0.2%) | 0 (0%) | 2 (0.2%) | ||||
| Light thinness | 2 (0.2%) | 1 (0.1%) | 3 (0.3%) | ||||
| Normal | 155 (15.5%) | 88 (8.8%) | 243 (24.3%) | ||||
| Pre-obesus | 333 (33.3%) | 109 (10.9%) | 442 (44.2%) | ||||
| Mild obesity | 170 (17%) | 52 (5.2%) | 222 (22.2%) | ||||
| Average obesity | 50 (5%) | 13 (1.3%) | 63 (6.3%) | ||||
| Morbid obesity | 18 (1.8%) | 5 (5%) | 23 (2.3%) | ||||
| Total | 731 (73.1%) | 269 (26.9%) | 1,000 (100%) | ||||