Generalized observations of temporal trends in mortality could mask relevant specific patterns. The objective of this study is to analyze the trend of oral and oropharyngeal cancer mortality rates in Brazil,2000 to 2013, considering the differences by sex, anatomical site, age group and race. Data on oral and oropharyngeal cancer mortality were obtainedthe Mortality Information System. The trend of historical series mortality rates, by stratum, was estimated by generalized linear regression using the Prais-Winsten method. From 2000 to 2013, there were 61,190 deathsoral cancer and oropharynx (average of annual coefficients: 3.50 deaths/100 thousand inhabitants). The trend of mortality rates was stationary for males and increasing for females (1.31%/year). Growth pattern for men aged 20-29 years (2.92%/year) and for men of race/color brown (20.36%/year). Growth pattern was also identified for white women (2.70%/year) and brown women (8.24%/year). The surveillance of this condition should consider the sociodemographic differences of the population for an equitable planning of the strategies of care, because they reflected in different trends of mortality rates by oral and oropharynx cancer in Brazil.

Abstract
BACKGROUND:
To analyze the trends of oral and oropharyngeal cancer mortality in Uruguay between 1997 and 2014 according to sex and age groups and its possible association with sociodemographic factors.

MATERIAL AND METHODS:
A time-series ecological study using secondary data was performed. The data about mortality due to oral and oropharyngeal cancers were obtained from the Statistics Vitals Department of the Public Health Ministry of Uruguay. To estimate the mortality trends of the historical series, by sex, anatomical site and age groups, linear regressions generated by the Prais-Winsten procedure were used.

RESULTS:
The analysis of mortality trends for oral cavity and oropharyngeal cancers in Uruguay indicated that the global mortality rate was stable over the studied period. The women's mortality rate increased from 0.51 per 100,000 in 1997 to 0.65 per 100,000 in 2014 while for men, rates per 100,000 went from 3.22 in 1997 to 2.20 per 100,000 in 2014. Mortality from oral cancer in men decreased between 1997 and 2014. Mortality by oropharyngeal cancer, irrespective of sex, remained stable. Analysis by cancer site revealed decreasing trends tumors situated in the base of the tongue and gum. Years of education, unemployment, smoking and Gini index were not associated with mortality trends.

CONCLUSIONS:
The overall mortality from oral and oropharyngeal cancer in Uruguay has remained constant in the period between 1997 and 2014. Oral cancer mortality decreased in men and increased in women and decreased at the base of the tongue. It's necessary to continue monitoring the behavior of these diseases.