Search for dissertations about: "Dizygotic"
Showing result 1 - 5 of 37 swedish dissertations containing the word Dizygotic.
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1. Prospective studies of hormonal and life-style related factors and risk of cancer
Abstract : Background: Androgens are important in prostate cancer development but how circulating levels of androgens affect risk of prostate cancer of different aggressiveness is not clear. Being childless has been associated with a lower risk of prostate cancer, but it is not clear if this association is causal or a result of residual confounding. READ MORE
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2. Genetic and environmental aspects of symptomatic gallstone disease
Abstract : Gallstone disease (GD) represents a major healthcare problem. Gallstones are likely to result from a complex interaction of the environment and the effects of multiple undetermined genes. READ MORE
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3. Crohn's disease : Studies on epidemiology, twins, aetiological factors and clinical course with special reference to smoking
Abstract : In an epidemiological study of the incidence of Crohn's disease in Orebro county during the 25-year period 1963-1987, the mean annual incidence was 6.1/105 inhabitants. During the first five year period the mean incidence was 4.3 but during the following four quinquennia the incidence was stable at around 6. READ MORE
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4. Risk factors and adverse pregnancy outcomes in small-for-gestational-age births
Abstract : The studies were undertaken to evaluate risk factors and outcomes in small-for-gestational-age (SGA) births, in cohort studies using the population-based Swedish Birth, Twin and Education Registers. A cohort study of pregnant women from Uppsala County evaluated the effect on birthweight by caffeine. READ MORE
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5. Epidemiological studies on diverticular disease of the colon
Abstract : Objective: The aims of this thesis were to evaluate if there is an association between diverticular disease and colorectal cancer (Paper I), to assess any genetic contribution to the occurrence of diverticular disease (Paper II), determine how common hospitalization and surgery for diverticular disease are in measures of admission rates, incidence rates and lifetime risk (Paper II), and to estimate mortality in diverticulitis patients, needing hospital care (Paper IV). Methods: Swedish national registries were cross-linked through individual personal identification numbers. READ MORE