IL6 and Patent foramen ovale: Two multiple linear regression equations with (1) or without (2) GCPS, sAA, and IL‐6 were formulated to predict PFO‐final based on the detectable variables at the first visit (Formula 1: R2 = .929, F = 18.643 [p = .000], Formula 2; Table 6; R2 = .906, F = 31.267 [p = .000]).