While changes in HRR-1 were not significant in either group , change in HRR-2 for HAIT ( 9.5 6.4 bpm , 19.0 16.0 % , P < 0.01 ) was greater ( P = 0.03 ) than for CAT ( 1.6 10.9 bpm , 3.9 16.2 % , P = 0.42 ) .