Resumo Com a crescente preocupação acerca dos efeitos nocivos da poluição do ar na saúde da população, faz-se necessário a investigação e quantificação destes efeitos em nosso meio. Realizou-se um estudo de séries temporais com esse... more
Resumo Com a crescente preocupação acerca dos efeitos nocivos da poluição do ar na saúde da população, faz-se necessário a investigação e quantificação destes efeitos em nosso meio. Realizou-se um estudo de séries temporais com esse objetivo nas duas maiores ...
BACKGROUND: With the growing concern about the adverse effects of air pollution on health, it is necessary to investigate and quantify these effects in our cities. A time-series study with the objective of analyzing the association... more
BACKGROUND: With the growing concern about the adverse effects of air pollution on health, it is necessary to investigate and quantify these effects in our cities. A time-series study with the objective of analyzing the association between exposure to outdoor levels ...
The thyroid is among the more radiosensitive organs in the body. The goal of this study was twofold: (1) to evaluate age-related changes in what is exposed to ionizing radiation in the neck area, and (2) to assess thyroid shield presence... more
The thyroid is among the more radiosensitive organs in the body. The goal of this study was twofold: (1) to evaluate age-related changes in what is exposed to ionizing radiation in the neck area, and (2) to assess thyroid shield presence in cephalometric radiographs Cephalometric radiographs at one academic setting were sampled and neck exposure was related to calendar year and patient's gender and age. In the absence of shields, children have more vertebrae exposed than adults (p < 0.0001) and females have more neck tissue exposed inferior to the hyoid bone than males (p < 0.0001). The hyoid bone-porion distance increased with age (p <0.01). Thyroid shields were visible in 19% of the radiographs and depended strongly on the calendar year during which patient was seen (p-value <0.0001). Compared to adults, children were less likely to wear thyroid shields, particularly between 1973 and 1990 (1.8% versus 7.3% -p-value < 0.05) and between 2001 and 2003 (7.1% versus ...
