Table 1.

BKVN Study Cohort

Patient	Year of Transplant	Year of Diagnosis	Time from Transplant to Biopsy Diagnosis of BKVN (Months)	BKVN Stagea	Plasma BKV DNAb (copies/ml)	Biopsy Creatinine (mg/dL)	Post Biopsy Year 1 Creatinine (mg/dL)	Post Biopsy Year 2 Creatinine (mg/dL)	Post Biopsy Year 3 Creatinine (mg/dL)
1	1999	2000	20.2	C	n/ac	2	n/a	n/a	2
2	2000	2000	2.8	A	n/a	1.4	1.8	1.8	1.7
3	2001	2004	35.9	C	3.8 × 105	2.2	3.1	HDd
4	2002	2003	11.5	A	n/a	2.6	3	2.8	2.8
5	2002	2005	33.6	B	1.3 × 106	2.2	2.7	3.5	4.1
6	2002	2004	22.2	B	2.0 × 105	1.2	HD
7	2003	2005	15.2	B	3.2 × 105	2	2	1.9	1.7
8	2005	2006	12.4	B	7.5 × 105	2	2	1.8	1.6
9	2005	2007	21	A	1.8 × 105	1.9	2.2	1.8	2
10	2005	2008	30.5	A	5.8 × 104	2.1	1.8	2.3	2.3
11	2005	2009	43	A	2.4 × 105	1.8	1.9	2	2.2
12	2005	2008	33.8	C	1.2 × 106	2.6	3.9	HD
13	2006	2006	6.5	A	1.7 × 105	1.6	1.7	1.3	1.5
14	2006	2007	13	A	1.8 × 106	1.4	1.4	1	1
15	2006	2009	36.7	B	1.1 × 107	2.2	2.9	3.2	3
16	2006	2007	8.7	A	4.5 × 106	2.9	4	HD
17	2006	2007	19.4	B	8.2 × 106	1.9	HD
18	2006	2007	12.5	B	5.6 × 106	3	HD
19	2006	2006	3.2	B	5.9 × 105	2.6	HD
20	2006	2006	6	B	1.6 × 104	6.1	HD
21	2007	2008	9.3	B	1.7 × 105	2.1	1.9	2	1.8
22	2008	2008	10.7	B	1.2 × 105	4.7	3.2	2.9	3.4
23	2008	2009	10.5	A	9.0 × 105	2.1	1.5	1.9	1.8
24	2008	2008	5.6	A	9.5 × 104	2.2	2.3	2.6	2.4
25	2008	2008	7.3	A	2.7 × 105	2.1	2.3	2.8	2.8
26	2008	2009	9.2	B	9.0 × 105	1.2	1.1	1.2	1
27	2008	2008	5.5	A	7.1 × 105	1.9	1.8	1.9	2.4
28	2008	2009	2.8	B	5.1 × 105	3.3	3.7	HDc
29	2008	2009	12.2	B	2.5 × 105	3.5	HD

^aBKVN stage was determined using the Banff 2009 working proposal (14);

^bPlasma DNA copies were measured using commercially available assays (http://www.viracor.com)(24)

^cn/a=not available;

^dHD = return to hemodialysis.