668 research outputs found

    Maternal preconception diet and the sex ratio

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    Long-term Effects of Famine on Life Expectancy: A Re-analysis of the Great Finnish Famine of 1866-1868

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    Famines are extreme cases of environmental stress, and have been used by a series of studies to explore the long-term consequences of the fetal or childhood environment. Results are inconsistent and do not support negative long-term effects on mortality. The authors test the hypothesis that selection during famine changes the frailty distributions of cohorts and may hide negative long-term effects. They use death counts from age 60+ from the Human Mortality Data Base for the birth cohorts 1850-1854, 1855-1859, 1860-1865, 1866-1868, 1869-1874, 1875-1879, 1880-1884 and 1885-1889 to explore the effect of being born during the Great Finnish Famine 1866-1868. Swedish cohorts without famine exposure are analysed as a control group. Cohorts born in Finland during the Great Finnish Famine are highly heterogeneous in their distribution of deaths after age 60. By contrast, cohorts born in the years immediately after the famine are particularly homogeneous. Accounting for these differences results into a lower remaining life expectancy at age 60 for cohorts born during the famine. Statistically, long-term effects of famine on mortality become only visible when changes in the frailty distribution of cohorts are explicitly considered.old-age mortality, selection, debilitation, early life circumstances

    Maternal preconception diet and the sex ratio

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    Physical and psychological health at adolescence and home care use later in life

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    OBJECTIVES: To examine the relation between physical and psychological health indicators at adolescence (age 18) and household, personal, and nursing home care use later in life at ages 57–69 years. METHODS: Using medical examinations on men born in 1944–1947 who were evaluated for military service at age 18 in the Netherlands, we link physical and psychological health assessments to national administrative microdata on the use of home care services at ages 57–69 years. We postulate a panel probit model for home care use over these years. In the analyses, we account for selective survival through correlated panel probit models. RESULTS: Poor mental health and being overweight at age 18 are important predictors of later life home care use. Home care use at ages 57–69 years is also highly related to and interacts with father’s socioeconomic status and recruits’ education at age 18. DISCUSSION: Specific health characteristics identified at age 18 are highly related to the later utilization of home-care at age 57–69 years. Some characteristics may be amenable to early life health interventions to decrease the future costs of long-term home care

    Parakeets, canaries, finches, parrots and lung cancer: no association.

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    The relationship between pet bird keeping and lung cancer according to exposure to tobacco smoking was investigated in a case-control study in hospitals of New York City and Washington, DC, USA. Newly diagnosed lung cancer cases (n = 887) aged 40-79 years were compared with 1350 controls with diseases not related to smoking, of the same age, gender and date of admission as the cases. The prevalence of pet bird keeping was 12.5% in men and 19.1% in women. There was no association between ever keeping a pet bird and lung cancer in never smokers (men adjusted odds ratio (OR) = 0.70, 95% confidence interval (Cl) 0.15-3.17; women, 1.32, 95% Cl 0.65-2.70), or in smokers and non-smokers combined, after adjustment for ever smoking (men: 1.28, 95% Cl 0.88-1.86; women: 1.17, 95% Cl 0.83-1.64; all: 1.21, 95% Cl 0.95-1.56). Risk did not increase in relation to duration of pet bird keeping. Cases and controls kept similar types of birds. There was a tenfold increase of lung cancer risk associated with smoking among non-bird keepers (adjusted OR = 9.15). There was no indication of a synergism, either additive or multiplicative, between smoking and pet bird keeping with respect to lung cancer risk. Either alone or in conjunction with smoking, keeping parakeets, canaries, finches or parrots is not a risk factor for lung cancer among hospital patients in New York and in Washington, DC

    War- and famine-related excess mortality among civilians in the Netherlands, 1944-1945

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    National estimates exist for war- and famine-related deaths in the Netherlands during the last stages of World War II, but no such estimates are available at the local level. To fill this information gap, this article aims at mapping and visualizing the timing of war- and famine-related excess mortality by municipality among the civilian population within the Netherlands. We use mortality statistics at the level of municipalities because these are the smallest administrative units for which this information is available. We use a seasonally adjusted mortality model combined with a difference-in-difference approach to estimate the number of excess deaths in the period between January 1944 and July 1945 separately for each Dutch municipality

    ΠžΡΠΎΠ±Π΅Π½Π½ΠΎΡΡ‚ΠΈ формирования ΠΈΠ·ΠΎΡ‚ΠΎΠΏΠ½ΠΎ-ΠΌΠΎΠ΄ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹Ρ… частиц Π² ΠΏΠ»Π°Π·ΠΌΠ΅ Π² условиях постоянного ΠΌΠ°Π³Π½ΠΈΡ‚Π½ΠΎΠ³ΠΎ поля

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    ЦСль Ρ€Π°Π±ΠΎΡ‚Ρ‹ – исслСдованиС влияния внСшнСго постоянного слабого ΠΌΠ°Π³Π½ΠΈΡ‚Π½ΠΎΠ³ΠΎ поля Π½Π° Ρ€Π°Π·ΠΌΠ΅Ρ€Ρ‹ наночастиц, Ρ„ΠΎΡ€ΠΌΠΈΡ€ΡƒΠ΅ΠΌΡ‹Ρ… Π² Π³Π°Π·ΠΎΠ²ΠΎΠΉ Ρ„Π°Π·Π΅ Π² Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π΅ Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ пробоя ΠΈΠ· ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ ΠΈΠ· оксидной ΠΊΠ΅Ρ€Π°ΠΌΠΈΠΊΠΈ. Π’ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π΅ исслСдования построСна фСномСнологичСская модСль ΠΏΡ€ΠΎΡ‚Π΅ΠΊΠ°ΡŽΡ‰ΠΈΡ… процСссов ΠΈ ΠΏΡ€ΠΎΠ²Π΅Π΄Π΅Π½ Π°Π½Π°Π»ΠΈΠ· Ρ€Π°Π·ΠΌΠ΅Ρ€ΠΎΠ² микрочастиц для Π²Π΅Ρ€ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΠΈ Ρ‚Π΅ΠΎΡ€ΠΈΠΈ.The aim of this work is studying the effect of an external constant weak magnetic field on the size of nanoparticles formed in the gas phase as a result of laser-induced breakdown from an oxide ceramic substrate. As a result of the research, a phenomenological model of the processes was created and the size of microparticles was analyzed to verify the theory
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