The Rise in Mortality from Breast Cancer in Young Women: Trend Analysis in Brazil.

For the trend analysis, the polynomial regression model was used, and a significant trend was considered when the estimated model obtained a p value <0.05.

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In the Southeast, despite having the highest average rate for the period (34.35), there was a decreasing trend (-0.39 per year).

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The polynomial regression analysis showed an increasing trend of mortality from breast cancer in Brazil (increase of 0.18 each year; r 2 = 0.92), as well as in the Brazilian regions where the highest average rates were found in the South (16.40) and Southeast (16.27).

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