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| Periods | Percentage of PTMC | Age, years | F/M | Percentage of coexisting disease | ||
|---|---|---|---|---|---|---|
| Nodular goiter | Chronic lymphocytic thyroiditis | Adenoma | ||||
| 2009 to 2012 | 13.99% | 46.44±10.42 | 3.8 | 41% | 21% | 2% |
| 2013 to 2018 | 8.64% | 44.88±10.37 | 3.0 | 31% | 22% | 2% |
| P | <0.001 | <0.01 | NS | <0.01 | NS | NS |
PTC, papillary thyroid cancer; PTMC, papillary thyroid microcarcinoma; USI, universal salt iodization.
