Table 3.

Performance of machine learning models in classifying participants with stable cognition (SC) from participants with declining cognition (DC) in ADNI sample

Model	Sensitivity, % (CI)	Specificity, % (CI)	PPV, % (CI)	NPV, % (CI)	Accuracy, % (CI)
Decision trees (DT)	79.5 (72.1–85.6)	21.5 (11.3–35.3)	75.0 (71.8–78.0)	26.2 (16.1–39.5)	64.9 (57.8–71.4)
k-Nearest	80.1	33.3	78.0	36.2	68.3
Neighborhood (kNN)	(72.8–86.1)	(20.8–47.9)	(74.3–81.4)	(25.2–48.3)	(61.4–74.7)

PPV, positive predictive value; NPV, negative predictive value.