Within  days of registration: Serum creatinine < . mg/dL (. umol/liter)
Serum creatinine =< . mg/dL ( umol/L)
Serum creatinine <  umol/L (< . mg/dL) or . x the upper limit of normal, whichever is less
Creatinine < . mg/dl (=  umol/L) or
Serum creatinine =< . mg/dL or  umol/L
Serum creatinine =< . mg/dL or  umol/L
Serum creatinine =< . mg/dL or  umol/L
Serum creatinine =< . mg/dL or  umol/L obtained =<  weeks prior to enrollment
Serum creatinine =< . mg/dL or  umol/L
Serum creatinine =< . mg/dL ( umol/L)
Creatinine =< . mg/dL or  umol/L
Serum creatinine =< . mg/dL or  umol/L
Creatinine >  umol/L ( mg/dL)
Serum creatinine =< . mg/dL or  umol/L
Creatinine =< . mg/dL ( umol/L), or if > . mg/dL, calculated creatinine clearance >=  cc/min)
Serum creatinine =< . mg/dL or  umol/L
Serum creatinine =< . mg/dL or  umol/L
Creatinine >  umol/L ( mg/dL)
Serum creatinine =< . mg/dL or  umol/L
Serum creatinine =<  mg/dL ( umol/L) and creatinine clearance >=  ml/min
Serum creatinine > . mg/dL ( umol/L) in females and > . mg/dL ( umol/L) in males; patients with serum creatinine values exceeding these limits are eligible for the study if their estimated glomerular filtration rates (GFR) are >  ml/min/. m^
Within  days prior to signing consent: Serum creatinine > . mg/dL or  umol/L
Serum creatinine =<  umol/L (.mg/dL)
Individuals with plasma creatinine >  umol/L
Plasma creatinine in excess of  umol/L within  days prior to surgery