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Table 3 Confusion matrix

From: Predicting the course of Alzheimer’s progression

Actual

Predicted

Row total

Overall class error

CN

MCI

Dementia

CN

1218 (96.51%)

44 (3.49%)

0 (0.00%)

1262

0.035

MCI

29 (1.16%)

2382 (95.17%)

92 (3.68%)

2503

0.048

Dementia

0 (0.00%)

107 (4.84%)

2105 (95.16%)

2212

0.048

Column total

1247

2533

2197

5977

0.046

  1. This confusion matrix summarizes the performance of the random forest algorithm for classifying diagnoses based on contemporaneous observations. The table compares actual diagnoses observed in the training set with diagnoses predicted by the random forest based on observed continuous data and baseline predictors
  2. CN control, MCI mild cognitive impairment