Among the four proteins examined, three showed statistically significant elevations in PAD vs. non-PAD patients as follows: CINC-1 (79.42 [SD 69.51] vs. 63.08 [SD 41.99] pg/mL, p < 0.001), CD95 (5.48 [SD 3.12] vs. 4.56 [SD 1.94] pg/mL, p = 0.001), and fractalkine (1093.42 [SD 1063.36] vs. 904.21 [SD 423.76] pg/mL, p = 0.02) (Table 2). The gene discussed is CX3CL1; the disease is peripheral arterial disease.