Table 2. Levels of recommendations from the National guidelines for the management of thyroid nodules in Thailand based on the strength of evidences and agreement among experts.

Categories of recommendation	Strength of evidence	Agreement among experts
1	High reliability*	Consensus
2A	Low reliability	Consensus
2B	Low reliability	No consensus
3	No reliability	Very high disagreement

*, systematic review from randomized controlled trial or well-designed randomized controlled trial.