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Thyroid cancer incidence classified by tumor size in Vermont, 1994–2007. The minimum number of tumors measured in any given year was 14 (1995); the maximum was 79 (2006). Using Ljung-Box Q analysis, the only significant trend occurred for tumors 1.1–2.0 cm in size in 2001–2004. When the 1.1–2.0 cm category was combined with either of the other two categories, there were no significant trends.
