No prior studies have stratified the difficulty of transoral and submental thyroidectomy (TOaST). The investigators aimed to investigate preoperative factors as indicators of difficult TOaSTs and to develop a predictive model accordingly.
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Number of participants with recurrent laryngeal nerve injury
Timeframe: through study completion, an average of 1 year
Number of participants with hypoparathyroidism
Timeframe: through study completion, an average of 1 year
Number of participants with mental nerve injury
Timeframe: through study completion, an average of 1 year
operative time
Timeframe: through study completion, an average of 1 year