Sökning: "dizygotic twins"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden dizygotic twins.

1. 1. Epidemiology and genetics in ulcerative colitis with special reference to twins and smoking

   Författare :Curt Tysk; Linköpings universitet; []
   Nyckelord :ulcerative colitis; ulcerative proctitis; epidemiology; incidence; prevalence; genetics; twins; colonic glycoproteins; smoking; primary sclerosing cholangitis; MEDICINE; MEDICIN;

   Sammanfattning : In an epidemiologic study of ulcerative proctocolitis during the period 1963-1987, annual incidence rates increased fourfold and was during the last 10 years 13.1/105 inhabitants. The prevalence on December 31, 1987 was 234/105 inhabitants. Both rates are high but close to recent reports. LÄS MER

3. 2. Crohn's disease : Studies on epidemiology, twins, aetiological factors and clinical course with special reference to smoking

   Författare :Eva Lindberg; Linköpings universitet; []
   Nyckelord :Crohn s disease; epidemiology; incidence; prevalence; smoking; genetics; twins; dietary antigens; yeast; Saccharomyces cerevisiae; mannan; gliadin; betalactoglobulin; ovalbuntin; MEDICINE; MEDICIN;

   Sammanfattning : 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. LÄS MER

4. 3. Family, Friend, or Foe? Essays in Empirical Microeconomics

   Författare :Hilda Ralsmark; Nationalekonomiska institutionen; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Family size; earnings; health; twins; well-being; divorce law; media; social tolerance; hate crime;

   Sammanfattning : This thesis consists of four studies that deal with how individual outcomes are shaped by social interactions. The scope of the thesis ranges from relationships between individuals in what is arguably the most fundamental building block in society today — the family — to more generalized relationships between different groups in society. LÄS MER

5. 4. Prospective studies of hormonal and life-style related factors and risk of cancer

   Författare :Sara Wirén; Pär Stattin; Håkan Jonsson; Tanja Stocks; Alicja Wolk; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; prostate cancer; epidemiology; androgens; risk factors; fatherhood status; dizygotic twins; height; cohort; case-control; prospective; Cancer Epidemiology; cancerepidemiologi;

   Sammanfattning : 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. LÄS MER

7. 5. Short- and Long-Term Influences of Education, Health Indicators, and Crime on Labor Market Outcomes : Five Essays in Empirical Labor Economics

   Författare :Elisabeth Lång; Ali M. Ahmed; Judy Rich; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; education; health indicators; crime; labor market outcomes; family background; twins; field experiments;

   Sammanfattning : The objective of this thesis is to improve the understanding of how several individual characteristics, namely education (years of schooling), health indicators (height, weight, smoking, alcohol consumption, and exercise), criminal behavior, and crime victimization, influence labor market outcomes in the short and long run. The first part of the thesis consists of three studies in which I adopt a within-twin-pair difference approach to analyze how education, health indicators, and earnings are associated with each other over the life cycle. LÄS MER