Table 2: Flexion-Relaxation Phenomenon in patients with chronic LBP and healthy controls (T-test).

 FRP   N   Mean   SD   SE   Sign
Rigt side
 
  LBP chronic   20   4.795   1.8366   0.4107   0.009
  Healthy   20   9.46   1.0023   0.2241
Left side
 
  LBP chronic   20   4.98   1.6574   0.3706   0.006
  Healthy   20   9.2   0.9274   0.2074

LBP low back pain; FRP Flexion Relaxation Phenomenon; SD standard deviation; SE standard error.