Strategic Project - UI 6 - 2011-2012

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Publications

The impact of winter cold weather on acute myocardial infarctions in Portugal

Publication . Vasconcelos, João; Freire, Elisabete; Almendra, Ricardo; Silva, Giovani L.; Santana, Paula

Mortality due to cardiovascular diseases shows a seasonal trend that can be associated with cold weather. Portugal is the European country with the highest excess winter mortality, but nevertheless, the relationship between cold weather and health is yet to be assessed. The main aim of this study is to identify the contribution of cold weather to cardiovascular diseases within Portugal. Poisson regression analysis based on generalized additive models was applied to estimate the influence of a human-biometeorological index (PET) on daily hospitalizations for myocardial infarction. The main results revealed a negative effect of cold weather on acute myocardial infarctions in Portugal. For every degree fall in PET during winter, there was an increase of up to 2.2% (95% CI ¼ 0.9%; 3.3%) in daily hospital admissions. This paper shows the need for public policies that will help minimize or, indeed, prevent exposure to cold.

2013Journal article

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Known Mean, Unknown Maxima? Testing the Maximum Knowing Only the Mean

Publication . Santos, Rui; Oliveira Martins, João Paulo; Felgueiras, Miguel

In the quantitative group testing problem, the use of the group mean to identify if the group maximum is greater than a prefixed threshold (infected group) is analyzed, using n independent and identically distributed individuals. Under these conditions, it is shown that the information of the mean is sufficient to classify each group as infected or healthy with low probability of misclassification when the underline distribution is a unilateral heavy-tailed distribution.

2015-07Journal article

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