Number of injuries per patient. X2 analysis to test H0: There is not statistically significant difference between the number of injuries per patient in those patients who received treatment (physical therapy, ozone and intravenous injections) to reduce the low back pain at a significance level of P

Table 7: Number of injuries per patient. X² analysis to test H₀: There is not statistically significant difference between the number of injuries per patient 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 6 as degrees of freedom (v).

	Treatment success
No. Injuries	Yes n (%)	No n (%)	Total	P value	X² calculated	X² table	H₀
0	41 (4.1%)	21 (2.1%)	62 (6.2%)	0.5540	4.9205	12.5915	Accepted
1	358 (35.8%)	132 (13.2%)	490 (49%)
2	246 (24.6%)	92 (9.2%)	338 (33.8%)
3	56 (5.6%)	19 (1.9%)	75 (7.5%)
4	25 (2.5%)	4 (0.4%)	29 (2.9%)
5	2 (0.2%)	0 (0%)	2 (0.2%)
6	3 (0.3%)	1 (0.1%)	4 (0.4%)
Total	731 (73.1%)	269 (26.9%)	1,000 (100%)