Table 4.

Correlations between the baseline urine NGAL concentrations (uNGAL) and NGAL to creatinine ratios (uNGAL/Cr) and the changes in eGFR observed during the study as well as the eGFR based on mean serum creatinine during the follow-up.

Variable	Time from Transplantation at the Start of the Study
	1–6 Years (n = 49)		7–22 Years (n = 60)
	uNGAL	uNGAL/Cr	uNGAL	uNGAL/Cr
Final/baseline eGFR	R = −0.28; p = 0.06	R = −0.27; p = 0.07	R = −0.34; p = 0.008	R = −0.36; p = 0.007
Final–baseline eGFR	R = −0.34; p = 0.023	R = −0.29; p = 0.05	R = −0.31; p = 0.020	R = −0.31; p = 0.019
eGFR based on mean creatinine during follow-up	R = −0.08; p = 0.6	R = −0.06; p = 0.7	R = −0.29; p = 0.029	R = −0.35; p = 0.007