Factors That Affect the False-Negative Outcomes of Fine-Needle Aspiration Biopsy in Thyroid Nodules

Table 2

Comparison of study groups.

Parameters	Group 1 (𝑛=81)	Group 2 (𝑛=649)	𝑃
Nodule size (mm); Mean (±SD)	28.5±15.5	24.0±15.0	NS
Contribution of cytopathologist			<0.001
Yes	6	553
No	75	96
Nodule internal components			NS
Solid	34	362
Mix	47	287