In individuals with HF, no significant association was found between DII scores and NT-proBNP levels in the crude model (β = 73.46, 95%CI: -72.99–219.90, p = 0.317), Model I (β = 52.8, 95%CI: -79.85–185.46, p = 0.424), or Model II (β = 106.16, 95%CI: -52.50–264.82, p = 0.182). Here, NPPB is linked to hydrops fetalis.