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Performance of k-Nearest Neighborhood (kNN) models in prediction of cognitive change (stable versus decliner) in the LFAN sample
| Follow up duration | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) |
|---|---|---|---|---|---|
| 12 months | 65.5 (51.8–77.7) | 47.0 (23.0–72.2) | 80.8 (72.2–87.3) | 28.6 (17.8–42.5) | 61.3 (49.4–72.3) |
| 23 months | 67.6 (49.5–82.6) | 57.1 (18.41–90.1) | 88.5 (75.9–94.9) | 26.7 (14.0–44.8) | 65.8 (49.4–79.9) |
PPV, positive predictive value; NPV, negative predictive value.
