The numeric rating pain scores for groups B and BF were significantly reduced from a mean prespinal score of 8.17 + / - 0.96 cm and 8.30 + / - 0.23 cm respectively to a mean post-spinal pain score of 0.23 + / - 0.45 cm and 0.09 + / - 0.47 cm respectively , p = 0.000 .