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Visar resultat 1 - 5 av 38 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Adolescent depression : Epidemiology, nosology, life stress, and social network

   Författare :I. Gunilla Olsson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurosciences; Adolescent; depression; epidemiology; social network; family; life events; Neurovetenskap; Neurology; Neurologi; barn- och ungdomspsykiatri; Child and Youth Psychiatry;

   Sammanfattning : The study engaged a total population of 16-17-year-old urban high-school students and 2300 (93%) were screened for depression and previous suicide attempts. Adolescents with high depression scores in self-evaluation (12.3%) or reporting previous suicide attempts (2. LÄS MER

3. 2. Exploring patterns of empirical networks

   Författare :Luis E C Rocha; Petter Holme; Kimmo Kaski; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; complex systems; complex networks; network analysis; empirical networks; air transportation; consumer complaints; information technology; sexual contacts; epidemics; vaccination; Statistical physics; Statistisk fysik; Computational physics; Beräkningsfysik; Technology and social change; Teknik och social förändring; Epidemiology; Epidemiologi; Information technology; Informationsteknik; fysik; Physics; Statistics; statistik; Epidemiology; epidemiologi; Economics; nationalekonomi;

   Sammanfattning : We are constantly struggling to understand how nature works, trying to identify recurrent events and looking for analogies and relations between objects or individuals. Knowing patterns of behavior is powerful and fundamental for survival of any species. LÄS MER

4. 3. Biomarkers of one-carbon metabolism in colorectal cancer risk

   Författare :Björn Gylling; Richard Palmqvist; Katarina Bälter; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Colorectal cancer; one-carbon metabolism; biomarkers; folate; epidemiology; Cancer Epidemiology; cancerepidemiologi;

   Sammanfattning : One-carbon metabolism, a network of enzymatic reactions involving the transfer of methyl groups, depends on B-vitamins as cofactors, folate as a methyl group carrier, and amino acids, betaine, and choline as methyl group donors. One-carbon metabolism influences many processes in cancer initiation and development such as DNA synthesis, genome stability, and histone and epigenetic methylation. LÄS MER

5. 4. Low social support and disturbed sleep : epidemiological and psychological perspectives

   Författare :Maria Nordin; Anders Knutsson; Elisabet Sundbom; Steven Linton; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; social support; sleep initiation and maintenance disorder; psychological adaptation; myocardial infarction; social psychology; public health; mental health; occupational health; epidemiology; cohort studies; Public health science; Folkhälsovetenskap;

   Sammanfattning : The Swedish work force underwent dramatic changes during an economic crisis in the 1990s. In the aftermath, sick leave increased at an unprecedented rate and stress-related disorders, such as burnout, depression, and sleep disturbances replaced earlier work-related diagnoses. LÄS MER

7. 5. Closing the gap : applying health and socio-demographic surveillance to complex health transitions in South and sub-Saharan Africa

   Författare :Stephen M Tollman; Stig Wall; Demissie Habte; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; demographic surveillance system; health transition; mortality transition; fertility transition; health policy; primary health care; South Africa; Epidemiology; Epidemiologi;

   Sammanfattning : Background: The challenge of research in resource-poor settings remains a profound concern and is closely linked to African social development. Work of this thesis spans the end of apartheid and first decade of the democratic era in South Africa, along with emergence of the HIV/AIDS pandemic. LÄS MER