MDRD (Modification of Diet in Renal Disease) as a estiamtor of glomerular filtration rate (GFR) from serum creatinine, measured 7, 30 days and 3, 6, 12, 24, 36 and 60 months after kidney transplantation
Source
Artificial dataset generated to be consistent with Maria M. study
Details
Example of longitudinal study, note that graft for all patients survives 5 years after kidney transplantation.