When comparing these values using paired t-tests, the average copy number for IDH-wildtype infiltrating astrocytoma was lower than in IDH-mutant infiltrating astrocytoma (p = 1.02 × 10–4) and oligodendroglioma (p = 1.85 × 10–6). The gene discussed is IDH1; the disease is astrocytoma (excluding glioblastoma).