Table 5.

Confusion matrix and performance of the model used for pathological validation of perineural invasion (whole slide images).

First pathologist (LYL)*
	Actual: positive (n)	Actual: negative (n)
Predicted: positive	TP (12)	FP (7)
Predicted: negative	FN (4)	TN (384)
	Sensitivity: 75.00%	Specificity: 98.20%	Accuracy: 97.29%
Second pathologist (CHY)*
	Actual: positive (n)	Actual: negative (n)
Predicted: positive	TP (11)	FP (8)
Predicted: negative	FN (1)	TN (385)
	Sensitivity: 91.66%	Specificity: 97.96%	Accuracy: 97.77%

TP, true positive; FP, false positive; FN, false negative; TN, true negative.

*Accuracy for recognition of nerve structures: First pathologist, 87.90% (407/463); Second pathologist, 87.09% (405/460).