For example, at the 125 pg/mL threshold the sensitivity and specificity of NT-proBNP among people with AF were 98.8% (95% CI [98.5, 99.1]) and 13.2% (95% CI [12.6, 13.7]), respectively compared to corresponding values among people without AF of 92.9% (95% CI [92.4, 93.4]) and 53.8% (95% CI [53.6, 54.1]) (Table 2). The gene discussed is NPPB; the disease is atrial fibrillation.