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Table 5 Comparison of mean values of extension of lumber 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 valueP value
Pre-treatment39.35 ± 15.6933.70 ± 10.721.3300.191 (NS)
Post-treatment51.00 ± 14.7644.95 ± 12.531.3970.170 (NS)
Mean difference11.6511.25 
% change33.3829.61
t value− 11.766− 6.999
p value0.001 (S)0.001 (S)
  1. NS not significant, S significant