Comparison of efficacy of corticosteroid injection versus extracorporeal shock wave therapy on inferior trigger points in the quadratus lumborum muscle: a randomized clinical trial

Table 3 Number of patients achieved study outcomes^a and comparison of relative risk (RR) and number needed to treat (NNT) between the two groups based on study outcomes (n = 54)

Clinical Values		ESWT (n = 27)	Corticosteroid TPI (n = 27)	MD _{(ESWT-Corticosteroid)}(95% CI) P Value †
Clinical Values		Mean ± SD	Mean ± SD	MD _{(ESWT-Corticosteroid)}(95% CI) P Value †
ODI	Week 2	6.37 ± 0.75	10.41 ± 0.89	−4.56 (−6.01 to − 0.89) 0.007
ODI	Week 4	8.18 ± 1.05	4.04 ± 0.66	4.63 (1.14 to 8.11) 0.002
PPT	Week 2	5.33 ± 0.76	9.30 ± 0.78	−4.33 (− 7.27 to − 3.40) 0.001
PPT	Week 4	6.22 ± 0.89	4.96 ± 0.69	1.11 (− 1.94 to 3.72) 0.379
SF-36	Week 2	7.33 ± 1.35	5.78 ± 1.20	2.37 (− 6.62 to 1.87) 0.672
SF-36	Week 4	9.41 ± 1.71	1.70 ± 1.02	8.12 (4.83 to 12.20) < 0.001
VAS	Week 2	1.81 ± 0.16	3.70 ± 0.32	−2.30 (−3.16 to − 1.43) < 0.001
VAS	Week 4	2.52 ± 0.29	1.78 ± 0.19	0.71 (−0.36 to 1.23) 0.109

Abbreviations: ESWT Extracorporeal shockwave, TPI Trigger point injection, SD standard deviation, MD mean difference, CI confidence interval, ODI Oswestry disability index, PPT Pressure Pain Threshold, SF-36 Short Form (36) Health Survey, VAS Visual Analogue Scale
Symbols: †P values obtained from Mixed ANOVA test

ISSN: 1471-2474