Table 2.

Descriptive analysis and Chi-square test of the percentages of degeneration of the deltoid and the biceps muscles between groups A and B, and Wilcoxon signed rank test of significance between pre- and post-treatment values in each of the two groups.

Variable		Median/IQR		X2	p Value
		Group A	Group B
Deltoid muscle	Pre-treatment	76.05/42.15	75.65/38.5	0.347	0.805
	Post-treatment	34.25/43.47	17.45/27.5	0.460	0.048
	Z-test	−3.059	−3.059
	Asymp. Sig. (2-tailed)	0.002	0.002
Biceps muscle	Pre-treatment	87.65/58.25	72.7/33.55	0.404	0.961
	Post-treatment	57.65/61.13	22.9/41.15	0.347	0.021
	Z-test	−3.059	−3.059
	Asymp. Sig. (2-tailed)	0.002	0.002

IQR = Inter-quartile range, X² = chi-square.

Z-test = Wilcoxon signed rank test based on positive ranks.

Statistical significance at p < 0.05.