sentence: Utilizing the Kruskal-Wallis test , while the mean IgG against BKPyV was higher among viruric and viremic than BK negative patients at 3 , 6 and 12 months , this did not reach significance until month 12 ( BK negative 1.25 ± 0.70 , viruria 2.03 ± 0.43 , viremia 2.15 ± 0.02 ; P = 0.02 ) ( Fig 3 ) .