TABLE 2 Percent time in therapeutic ANC range and skewed metabolite resolution. Median percent time in ANC goal range are compared between pre- and post-allopurinol initiation, pre-allopurinol and no allopurinol initiation, and post-allopurinol and no allopurinol initiation. Additionally, median 6MMP:6TGN ratios are compared between pre- and post-allopurinol initiation, pre-allopurinol and no allopurinol initiation, and post-allopurinol and no allopurinol initiation.P <0.05 were considered significant and bolded below.