Ccf-mtDNA levels were also significantly associated with HbA1c across the entire group (r = 0.245, p < 0.001) and within each group separately (PTSD negative: r = 0.248, p = 0.006; PTSD positive: r = 0.249, p = 0.012). The gene discussed is PITX1; the disease is post-traumatic stress disorder.