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Diagnostic parameters of the ANN model in the 10 testing datasets. The mean Youden index, sensitivity, specificity and accuracy of the ANN model for the diagnosis of large vessel occlusion (LVO) were 0.640, 0.807, 0.833, and 0.820, respectively. The mean Youden index, sensitivity, specificity and accuracy of the ANN model* only included NIHSS items were 0.557, 0.729, 0.828, 0.778, respectively.
