By income-classified exemplary country Among 201 income-classified countries, 27 (87.1%) low-income, 44 (93.6%) lower-middle-income, 57 (96.7%) upper-middle-income, and 53 (82.8%) high-income countries showed an increasing trend of ASIR between 1990 and 2019, while 17 (54.8%), 14 (29.8%), 33 (55.9%), and 45 (70.3%) countries in each income stratum showed a reduction in ASMR.
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Geographic disparities in trends of thyroid cancer incidence and mortality from 1990 to 2019 and a projection to 2030 across income-classified countries and territories.
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The sentences
We observed a decreasing trend of mortality was observed in the whole population across all age groups among the high-income group.