The Egyptian Journal of Neurology, Psychiatry and Neurosurgery

Table 4 Comparison of mean values of flexion of lumbar spine within and between both groups

From: Efficacy of spinal extension exercise program versus muscle energy technique in treatment of chronic mechanical low back pain

	Group A (n = 20)	Group B (n = 20)	t value	P value
Pre-treatment	51.00 ± 11.77	51.30 ± 10.01	− 0.087	0.931 (NS)
Post-treatment	61.10 ± 11.92	59.85 ± 8.11	0.388	0.700 (NS)
Mean difference	10.10	8.55
% change	19.80	16.67
t value	− 14.522	− 7.616
p value	0.001 (S)	0.001 (S)

NS not significant, S significant

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