Nonetheless , improvement in the respective scores was greater in the PRP than bupivacaine group after 3 months ( 42.5 % vs. 30.9 % , 34.1 % vs. 27.2 % , and 50.7 % vs. 39.6 % ) , 6 months ( 67.3 % vs. 20.1 % , 40.6 % vs. 16.3 % , and 71.4 % vs. 31.1 % ) , and one year ( 83.2 % vs. 45.6 % , 47.0 % vs. 21.7 % , and 76.6 % vs. 56.3 % ) .