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. 2021 Jul 14;10(7):893. doi: 10.3390/pathogens10070893

Table 4.

Models with only sensitivity and/or specificity values.

Type of Model References Sensitivity (%) Specificity (%) Youden Index
Classification and regression tree (CART) [71] 75 78 0.53
Classification and regression tree (CART) [91] 89 96 0.86
Classification and regression tree (CART) [33] 87 - ND
Generalized linear model (GLM) [53] 100 80 0.80
Generalized linear model (GLM) [59] 91.3 96.4 0.87
Generalized linear model (GLM) [63] 89 82 0.71
Generalized linear model (GLM) [91] 90 95 0.85
Generalized linear model (GLM) [33] 88.5 - ND
Linear discriminant analysis (LDA) [91] 85 98 0.84
Maximum entropy (MaxEnt) [16] 95.76 76 0.72
Maximum entropy (MaxEnt) [71] 79 78 0.57
Maximum entropy (MaxEnt) [64] 79.5 - ND
Maximum entropy (MaxEnt) [33] 84 - ND
Bayesian hierarchical models [102] >90 <60 ND

The Youden index represents the sum of the sensitivity and the specificity (expressed between 0 and 1) minus 1; ND: not determined.