For example, among people with AF, the sensitivity and specificity of NT-proBNP at the ESC recommended 125 pg/mL threshold was 98.5% (95% CI [97.8, 99.1]) and 18.8% (95% CI [17.8, 19.8]), respectively among people aged 45–64 years and 99.0% (95% CI [98.4, 99.4]) and 9.7% (95% CI [8.9, 10.6]), respectively among people aged 65–74 years (Table 3). Here, NPPB is linked to atrial fibrillation.