IL15 and aneurysm: Multivariate logistic analysis indicated that high IL-15 (OR, 3.23; 95% CI, 1.47–7.12; P = 0.004) and TNF-β (OR, 8.30; 95% CI, 3.25–21.25; P < 0.001) levels were associated with aneurysm progression (Table 3).