Table 5.

Aims and tools used by historical studies compared to the present study

Reference	Tool of the analysis	Was the biological reference histology?	Goal of the study regarding TIRADS	Size of the nodule taken into account as suggested by the respective TIRADS
Middleton et al. [23], Lauria Pantano et al. [24], Grani et al. [25], Wu et al. [26], Ha et al. [27], Xu et al. [28]	Image	No	To determine the distribution of benign and malignant cases among TIRADS categories	No
Gao et al. [29], Skowronska et al. [30], Chng et al. [34], Trimboli et al. [35]	Image	Yes		No
Current study	Video	Yes	To analyze the usefulness of TIRADS in recommendation of FNA	Yes

TIRADS, thyroid imaging reporting and data system; FNA, fine-needle aspiration.