The cores were significantly longer performing TP approach : at the site `` 1 '' ( 14.92 versus 12.97 mm , p = 0.02 ) ; at `` 5 '' ( 15.53 versus 13.69 mm , p = 0.037 ) ; at `` 7 '' ( 15.06 versus 12.86 mm , p = 0.001 ) ; at `` 9 '' ( 14.92 versus 13.38 mm , p = 0.038 ) ; at `` 11 '' ( 16.32 versus 12.31 mm , p = 0.0001 ) ; at `` 12 '' ( 15.14 versus 12.19 mm , p = 0.0001 ) ; at `` 13 '' ( 17.49 versus 13.98 mm , p = 0.0001 ) ; at `` 14 '' ( 16.77 versus 13.36 mm , p = 0.0001 ) .