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Table 3 Sensitivity/specificity table of the logistic regression algorithm

From: A cross-sectional study in healthy elderly subjects aimed at development of an algorithm to increase identification of Alzheimer pathology for the purpose of clinical trial participation

  Predicted Aβ + Predicted Aβ - Total
Actual Aβ + 50 21 71
Actual Aβ - 16 133 149
Total 66 154 220
  1. Sensitivity and specificity table calculated with a sensitivity of 70.82% and specificity of 89.25%. When aiming for 50 positively predicted Aβ positive subjects, 66 will be predicted as such. Therefore, 16 subjects will falsely be predicted as being Aβ positive and 21 will falsely be predicted as being Aβ negative