Among HF subtypes, Prx4 remained associated with incident HF with preserved (HR 1.27; 95% CI 1.05–1.53) as well as reduced ejection fraction (HR 1.19; 95% CI 1.04–1.37), with no significant difference between the subtypes (p = 0.64). The gene discussed is PRDX4; the disease is hydrops fetalis.