NPPB and prediabetes syndrome: South Asian women had lower levels of NT-proBNP than Nordic women in both the normoglycemic (median (IQR) 29 [17–37] vs. 40 (22–58) ng/L, p = 0.005) and prediabetes/diabetes groups (22 [14–39] vs. 44 (21–74) ng/L, p < 0.001).