Table 5.

Association of functional status and sonographic classification systems. Numbers in brackets are 95% confidence intervals

Parameter	Number of cold or indeterminate nodules	Number of hot nodules	Odds ratio	p value
ATA category				0.052
Benign—low suspicious	786	35 (4.3%)	1
Intermediate and high suspicious	192	16 (7.7%)	1.905 (0.995–3.648)
FNA required according to ATA				0.034
No FNA	497	18 (3.5%)	1
FNA	481	33 (6.4%)	1.944 (1.051–3.596)
ACR-TIRADS score				0.181
0–3	757	35 (4.4%)	1
≥ 4	221	16 (6.8%)	1.549 (0.815–2.945)
ACR-TIRADS FNA				0.340
No FNA	792	38 (4.6%)	1
FNA	186	13 (6.5%)	1.394 (0.704–2.759)
EU-TIRADS category				0.124
Benign and low risk	763	35 (4.4%)	1
Intermediate and high risk	215	16 (6.9%)	1.661 (0.869–3.173)
EU-TIRADS FNA				0.076
No FNA	681	29 (4.1%)	1
FNA	297	22 (6.9%)	1.721 (0.945–3.136)

Statistically significant findings, i.e. p < 0.05, were emphsised in italic