Table 4.

Impact of NIFTP Reclassification on Performance Characteristics of Thyroid Fine-Needle Aspiration

Cytology Categorya	Pre-TBSRTC				Post-TBSRTC
	NPV, %		PPV, %		NPV, %		PPV, %
	Original	NIFTP	Original	NIFTP	Original	NIFTP	Original	NIFTP
Benign	97.0	97.2	3.0	2.8
SFN/FN	91.8	92.8	8.2	7.2	88.4	87.3	11.6	12.7
SFM	26.9	32.1	73.1	67.9	12.9	14.3	87.1	85.7
Malignant					1.7	2.6	98.3	97.4

NIFTP, noninvasive follicular thyroid neoplasm with papillary-like nuclear features; NPV, negative predictive value; PPV, positive predictive value; SFN/FN, suspicious for follicular neoplasm/follicular neoplasm; SFM, suspicious for malignancy; TBSRTC, The Bethesda System for Reporting Thyroid Cytopathology.

^aOnly categories affected by reclassification included.