Table 4.

Spearman correlation coefficients and P-values showing the parameters that were significantly related to the free fractions of mycophenolic acid or mycophenolic acid glucuronide in 42 patients

	Free fraction
	Mycophenolic acid		Mycophenolic acid glucuronide
Parameter	Correlation	P-value	Correlation	P-value
Creatinine	0.46	0.002	0.41	0.008
Urea	0.53	<0.0001	0.41	0.007
Albumin	−0.54	<0.0001	−0.31	0.049
Total mycophenolic acid glucuronide AUC0−6	0.51	<0.0001	–	–
Free mycophenolic acid glucuronide AUC0−6	0.60	<0.0001	–	–

Results were calculated using Spearman correlation tests. AUC₀₋₆, Area under the curve from 0 to 6 h.