- Creatinine clearance > 80 mL/min based on the Cockcroft-Gault formula for subjects in Group 1; or 50 to less than or equal to 80 mL/min based on the Cockcroft-Gault formula and confirmed based on measured creatinine clearance for subjects in Group 2; or 30 to 49 mL/min based on the Cockcroft-Gault formula and confirmed based on measured creatinine clearance for subjects in Group 3