Change in iGFR at 12 months was significantly higher in the LD group ( 7.712.5 ml/min per 1.73 m ( 2 ) ; n = 9 ) than in the SC group ( -11.2 9.1 ml/min per 1.73 m ( 2 ) ; n = 9 ) ( LD versus SC : P < 0.01 ) .