Days from admission to death is non-negative (DaysDeathFromAdm>=0)
No preadmission dialysis appointment (PreAdmitDialysisCtrAppt = 0)
PreAdmDialysisCtrICD = 0
Most recent outpatient GFR >=15 (MostRecentOutPtGFR >= 15)
No preadmission renal transplantations (PreAdmit_RenalTransplant == 0 )
No dialysis post peak 23 to 30 days (PostPeak_23_30_Dialysis == 0)
Length of stay is 30 days or less (LOSDays <= 30)
No preadmission renal appointment (PreAdmitRenalClinicScheduledCtr == 0)
LastBefore30DayPostPeakGFR < 60
No preadmission renal visit (PreAdmitRenalClinicSeen == 0)
Non-missing PreAdmRenalConsultCtr
Analysis Population
All patients from Population Two plus
AKI stage 1 or greater (AKINStage >=1)
No discharge diagnosis of ESRD within 30 days of admission (missing Discharge_ESRD_WI30)
Not a preadmission hospice patient (PreAdmit_Hospice==0)
First admission (FirstAKIAdmit = 1)
Variable Definitions
DaysFirst30DayPostPeakGTE60GFR - the first time after 30 days post peak in which the GFR for the patient was above or equal to 60.
take all of the creatinines for each patient after the first 30 days post peak
calculated their GFR based on the equation (race, age, gender)
filter to keep only those that were 60 or above
find the first time (in days after 30 days peak) in which that was the case
RecoveredAfter270Days - if patient's recovery (GFR of 60 or greater) is observed at or after 270 days in the after-30-days-post-peak period.
DaysFirst30DayPostPeakGTE60GFR >= 270
strataBlGFR60, two levels
"less than 60" if MostRecentOutPtGFR<60
"60 or more" if MostRecentOutPtGFR >= 60
HundrPercServConn
date of service connection is before admission: 100SCDate < admDate
Analysis references
Robert J. Gray, A CLASS OF K-SAMPLE TESTS FOR COMPARING THE CUMULATIVE INCIDENCE OF A COMPETING RISK, The Annals of Statistics, 1988, Vol 16, No. 3, 1141-1154
Jason P. Fine, Robert J. Gray, A PROPORTIONAL HAZARD MODEL FOR THE SUBDISTRIBUTION OF A COMPETING RISK, Journal of the American Statistical Association, June 1999, Vol. 94, No. 446, 496-509
Melania Pintilie, COMPITING RISKS, A PRACTICAL PERSPECTIVE, 2006, John Wiley & Sons, Ltd.
Terry M. Therneau, Patricia M. Grambsch, MODELING SURVIVAL DATA, EXTENDING THE COX MODEL, 2000, Springer, New York