In asthma only, however, this cytokine was related to the prothrombin activity (β = 0.18 [95% CI, 0.1–0.26]), ETP (β = 0.15 [95% CI, 0.07–0.23]), and thrombin peak (β = 0.16 [95% CI, 0.08–0.23]). This evidence concerns the gene F2 and asthma.