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Causes of Excess Deaths in Puerto Rico After Hurricane Maria: A Time-Series Estimation.

Objectives. To determine the number and causes of excess deaths in Puerto Rico after Hurricane Maria made landfall on September 20, 2017. Methods. We obtained monthly vital statistics data on all deaths from January 2008 through October 2017. We conducted a time-series analysis to estimate excess mortality in September and October 2017 overall and by age, sex, and cause of death. Results. We estimated a total of 1205 excess deaths (95% confidence interval [CI] = 707, 1702). Excess deaths were slightly higher among men than women (632 and 579 deaths, respectively) and found only among people aged 60 years or older (1038 deaths). Most excess deaths occurred from heart disease (253 deaths), "other" causes (204 deaths), diabetes (195 deaths), Alzheimer's disease (122 deaths), and septicemia (81 deaths). Conclusions. The number of excess deaths was similar to recent government estimates. However, this study is the first to identify the causes of death that were exacerbated by the disaster. Public Health Implications. An accurate estimation of the top causes of excess mortality can help authorities plan resource allocation for the island's recovery and for the prevention of deaths in future disasters.