The results of the logistic regression presented in Table 7 show that the following variables—XPD 2251A>C (p = 0.004), XPF-673C>T (p < 0.001), and XPF 11985A>G (p < 0.001)—had a dependency relationship statistically significant to the MPN patients’ outcome. The gene discussed is ERCC4; the disease is myeloproliferative disorder.