Ultrasound-Guided Fine Needle Aspiration of Deep Thyroid Nodule: Is There a Correlation between the Nodule’s Depth and Nondiagnostic Results?

Table 2

Correlation between nodule depth and nondiagnostic cytology (Bethesda 1) according to depth cut-off.

Nodule depth (mm)	n	Bethesda 1	Bethesda 2–6	p
<10	147	12, 30.0	135, 55.6	0.003
≥10	136	28, 70.0	108, 44.4
<9	126	10, 25.0	116, 47.7	0.007
≥9	157	30, 75.0	127, 52.3
<8	97	8, 20.0	89, 36.6	0.040
≥8	186	32, 80.0	154, 63.4
act<7	67	5, 12.5	62, 25.5	0.073
≥7	216	35, 87.5	181, 74.5
<6	55	5, 12.5	50, 20.6	0.232
≥6	228	35, 87.5	193, 79.4