Influence of municipal socioeconomic indices on mortality rates for oral and oropharyngeal cancer in older adults in the State of São Paulo, Brazil.

Introduction: Oral and oropharyngeal cancer are diseases strongly influenced by socioeconomic factors. The risk of developing these diseases increases with age and most cases occur in the elderly, with higher mortality rates. This study aimed to analyze the influence of municipal socioeconomic indices on mortality rates for oral (OC) and oropharyngeal cancer (OPC) in elderly residents from 645 cities in the State of São Paulo, Brazil, from 2013 to 2015.
Method: Secondary data on deaths were obtained in the Mortality Information System from the Brazilian Ministry of Health. The number of elderly, as well as per capita median income values and Human Development Index by municipality (HDI-M) values were obtained from data by the SEADE Foundation. Descriptiveand exploratory analysis of data was performed, followed by negative binomial models described by the Proc Genmod procedure and evaluated by the corrected AIC (Akaike Information Criterion), the likelihood level, and the Wald test (α = 0.05).
Results: Around 30% of the cities notified deaths in 2013, 16.74% in 2014, and 18.61% in 2015. Founded mortality mean rates from OC and OPC were, respectively, 20.0 (± 430.9) and 10.7 (± 17.5) deaths per 100,000 inhabitants. Meanincome ranged, in local currency, from 434.2 to 2,009.00. HDI-M ranged from 0.65 to 0.89. There was a significant decrease (p<0.05) in mortality rates for OC and OPC in elderly with the increase in the cities' mean income and HDI-M values.
Conclusion: Socioeconomic inequalities in the cities the on mortality rates for OC and OPC in elderly residents.