6. A creatinine clearance <70 mL/min as determined by Salazar- Corcoran equations For men : [ 137- age]x [ ( 0.285x weight(kg0) +( 12.1x height(m)2]/ (51xSCr). For women; [146 - age]x( 0.287xweight(kg))+( 9.74xheight(m)2]/(60xSCr)