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Significant rise of papillary thyroid cancer between the second and third periods
| Time Period | Papillary cancer | Other types | Number of patients operated on |
| II (1997-2003) | 57 | 21 | 78 |
| III (2004-2015) | 168 | 29 | 197 |
| Total | 225 | 50 |
Chi-square: 5.593 P: 0.01 (p< 0.05) Fisher’s exact test: 0.0238 (p< 0.05) |
