Table 3. Proportion BKPyV viremia and BKPyVAN based on median trough levels.

3 months	Tac median >9.5ug/l	Tac median < 9.5ug/l	P value	CsA median >183.5ug/l	CsA median <183.5ug/l	P value
BKPyV viremia, n (%)	20 (50)	20 (50)	1	21 (56.8)	16 (43.2)	0.35
BKPyVAN, n (%)	6 (54,5)	5 (45,5)	0.76	3 (75)	1 (25)	0.31
12 months	Tac median >8.4ug/l	Tac median <8.4ug/l	P value	CsA median >163.5ug/l	CsA median <163.5ug/l	P value
BKPyV viremia, n (%)	14 (40)	21 (60)	0.16	20 (60.6)	13 (39.4)	0.17
BKPyVAN, n (%)	3 (50)	3 (50)	0.98	3 (60)	2 (40)	0.65

Chi squared tests were used to compare the proportion of BKPyV viremia and BKPyVAN in patients with trough levels higher and lower than median at 3 months and 12 months after renal transplantation.