Comparative study between blind and ultrasound-guided steroid injection for carpal tunnel syndrome

Egyptian Journal of Radiology and Nuclear Medicine

Table 2 Comparison between the two studied groups according to SSS and FSS

		Blind (n = 15)	Ultrasound (n = 15)	Test of sig	p
SSS	Before	26.67 ± 5.27	25.93 ± 6.71	t = 0.333	0.742
	After 4 weeks	19.07 ± 3.67	11.80 ± 1.57	t = 7.046^*	< 0.001^*
	p₁	< 0.001^*	< 0.001^*
	Reduction of SSS	7.60 ± 2.50	14.13 ± 5.29	U = 31.50^*	0.001^*
FSS	Before	19.40 ± 4.24	18.27 ± 5.23	t = 0.652	0.52
	After 4 weeks	14.53 ± 2.92	10.20 ± 2.08	t = 4.679^*	< 0.001^*
	p₁	< 0.001^*	< 0.001^*
	Reduction of FSS	4.87 ± 1.68	8.07 ± 3.77	U = 52.0^*	0.011^*

IQR: Interquartile range; SD: Standard deviation; t: Student’s t test; U: Mann–Whitney test
p: p value for comparing between the studied groups
p₁: p value for paired t test for comparing between before and after in each group
*Statistically significant at p ≤ 0.05