Abstract Open-water diving in a polar environment is a psychophysiological challenge to the human organism. We evaluated the effect of short-term diving (i.e., 10 min) in Antarctic waters on autonomic cardiac control, thyroid hormone concentration, body temperatures, mood, and neuropsychological responses (working memory and sleepiness). Data collection was carried out at baseline, before, and after diving in four individuals divided into the supporting (n=2) and diving (n=2) groups. In the latter group, autonomic cardiac control (by measuring heart rate variability) was also assessed during diving. Diving decreased thyroid-stimulating hormone (effect size = 1.6) and thyroxine (effect size = 2.1) concentrations; these responses were not observed for the supporting group. Diving also reduced both the parasympathetic (effect size = 2.6) and sympathetic activities to the heart (ES > 3.0). Besides, diving reduced auricular (effect size > 3.0), skin [i.e., hand (effect size = 1.2) and face (effect size = 1.5)] temperatures compared to pre-dive and reduced sleepiness state (effect size = 1.3) compared to basal, without changing performance in the working memory test. In conclusion, short-term diving in icy waters affects the hypothalamic-pituitary-thyroid axis, modulates autonomic cardiac control, and reduces body temperature, which seems to decrease sleepiness.

OBJETIVO: Avaliar a concordância de informações pesquisadas sobre causa básica de óbito por acidente de trânsito e compará-las com as codificações feitas a partir das Declarações de Óbitos. MATERIAL E MÉTODO: Foram estudados 50 óbitos por acidentes de trânsito ocorridos em 5 hospitais de Belo Horizonte, MG.Com base nas informações obtidas através de questionário procedeu-se à codificação da causa básica dos óbitos. A seguir foi feita análise de concordância entre esta classificação e a registrada na Declaração do Óbito. RESULTADOS: Foi calculado o Kappa (0,124) com intervalo de confiança 95% (-0,1533 - 0,4022), sendo considerada uma baixa concordância. Os dados mostraram também uma subclassificação de óbitos por acidentes de trânsito, uma vez que 32% dos 50 óbitos estudados foram codificados como acidentes não especificados (E928.9). CONCLUSÃO: Concluiu-se pela necessidade de haver maior esforço na melhoria do preenchimento da Declaração de Óbito pelos médicos legistas que realizam as necrópsias em mortes por acidentes de trânsito.

OBJECTIVE: An evaluation of information researched as to basic underlying cause of death by traffic accidents and a comparison with codings attributed on the basis of death certificates. MATERIAL AND METHOD: The official coding of underlying cause of death on Death Certificates was compared with coding based on primary data obtained from five hospitals and accident reports. Kappa statistics with 95% CI were used to assess the agreement between the two coding systems. RESULTS: The research covered 1,719 patients, 57 of whom died. Of these 57 deaths, the official coding for 50 was obtained. Data showed an underreporting of deaths by traffic accidents, since 32% of the 50 deaths were coded as non-specific accidents (E 928.9). There were also 38% of deaths coded as non-specific traffic accidents (E 819.9). Using primary data, non-specific traffic accidents dropped to 4%, accidents to pedestrians (E 814.7) being responsible for 48% of deaths. The Kappa coefficient (0.124), with 95% confidence interval (-0.1533 - 0.4022) was calculated to assess the inter-rater reliability between the two codings, which was considered poor. CONCLUSION: It is concluded that coroners, who perform autopsies on casualties of traffic accidents, should dedicabe greater effort to filling out Death Certificates correctly.

OBJETIVO: Avaliar a concordância de informações pesquisadas sobre causa básica de óbito por acidente de trânsito e compará-las com as codificações feitas a partir das Declarações de Óbitos. MATERIAL E MÉTODO: Foram estudados 50 óbitos por acidentes de trânsito ocorridos em 5 hospitais de Belo Horizonte, MG.Com base nas informações obtidas através de questionário procedeu-se à codificação da causa básica dos óbitos. A seguir foi feita análise de concordância entre esta classificação e a registrada na Declaração do Óbito. RESULTADOS: Foi calculado o Kappa (0,124) com intervalo de confiança 95% (-0,1533 - 0,4022), sendo considerada uma baixa concordância. Os dados mostraram também uma subclassificação de óbitos por acidentes de trânsito, uma vez que 32% dos 50 óbitos estudados foram codificados como acidentes não especificados (E928.9). CONCLUSÃO: Concluiu-se pela necessidade de haver maior esforço na melhoria do preenchimento da Declaração de Óbito pelos médicos legistas que realizam as necrópsias em mortes por acidentes de trânsito.

OBJECTIVE: An evaluation of information researched as to basic underlying cause of death by traffic accidents and a comparison with codings attributed on the basis of death certificates. MATERIAL AND METHOD: The official coding of underlying cause of death on Death Certificates was compared with coding based on primary data obtained from five hospitals and accident reports. Kappa statistics with 95% CI were used to assess the agreement between the two coding systems. RESULTS: The research covered 1,719 patients, 57 of whom died. Of these 57 deaths, the official coding for 50 was obtained. Data showed an underreporting of deaths by traffic accidents, since 32% of the 50 deaths were coded as non-specific accidents (E 928.9). There were also 38% of deaths coded as non-specific traffic accidents (E 819.9). Using primary data, non-specific traffic accidents dropped to 4%, accidents to pedestrians (E 814.7) being responsible for 48% of deaths. The Kappa coefficient (0.124), with 95% confidence interval (-0.1533 - 0.4022) was calculated to assess the inter-rater reliability between the two codings, which was considered poor. CONCLUSION: It is concluded that coroners, who perform autopsies on casualties of traffic accidents, should dedicabe greater effort to filling out Death Certificates correctly.