Clinical cure rates in the < 10g/mL , 10g/mL to < 15g/mL , and15g/mL vancomycin trough level groups were 70 % ( 21/30 ) , 55 % ( 18/33 ) , and 49 % ( 17/35 ) , respectively ( p = 0.09 ) , and the frequencies of patient death were 10 % ( 3/30 ) , 15 % ( 5/33 ) , and 20 % ( 7/35 ) , respectively ( p = 0.31 ) .