Search for dissertations about: "Ascertainment"

Showing result 1 - 5 of 25 swedish dissertations containing the word Ascertainment.

  1. 1. The Diabetes Incidence Study in Sweden (DISS): Ascertainment, risk factors, and problems with classification

    University dissertation from Bengt Littorin, Södervärns Vårdcentral, Ahlmansgatan 12, S-214 27 Malmö, Sweden

    Author : Bengt Littorin; [2001]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; type 1; stress; register; life events; incidence; ICA; family characteristics; GADA; epidemiology; diabetes mellitus; classification; Ascertainment; BMI; type 2; unclassifiable; year of diagnosis.; Endocrinology; secreting systems; diabetology; Endokrinologi; sekretion; diabetologi;

    Abstract : The Diabetes Incidence Study in Sweden (DISS) registers diabetes in young adults aged 15-34 years in Sweden. This thesis aims to validate the ascertainment, methods in the classification of diabetes, and putative etiological factors such as family background, psychological stress, and BMI, that may affect the incidence of diabetes in young adults, in the DISS registry. READ MORE

  2. 2. Design and analysis of response selective samples in observational studies

    University dissertation from Stockholm : Department of Mathematics, Stockholm University

    Author : Maria Grünewald; Stockholms universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ascertainment; missing data; outcome dependent sampling; response selective samples; sequential design; stochastic EM algorithm; MATHEMATICS Applied mathematics Mathematical statistics; MATEMATIK Tillämpad matematik Matematisk statistik; matematisk statistik; Mathematical Statistics;

    Abstract : Outcome dependent sampling may increase efficiency in observational studies. It is however not always obvious how to sample efficiently, and how to analyze the resulting data without introducing bias. READ MORE

  3. 3. Fetal Anomalies Surveillance and Diagnostic Accuracy of Ultrasound and Magnetic Resonance Imaging

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hashem Amini; Uppsala universitet.; [2010]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pregnancy termination; fetal anomalies; antenatal diagnosis; ultrasound; second trimester; fetal MRI; CNS anomalies; pregnancy management; non-CNS anomalies; fetal autopsy; birth defects registry; ascertainment; spina bifida; cleft lip palate; MEDICINE Surgery Obstetrics and women s diseases; MEDICIN Kirurgi Obstetrik och kvinnosjukdomar; MEDICINE Surgery Obstetrics and women s diseases Obstetrics and gynaecology; MEDICIN Kirurgi Obstetrik och kvinnosjukdomar Obstetrik och gynekologi; Obstetrik och gynekologi; Obstetrics and Gynaecology;

    Abstract : The aims were to investigate the accuracy of ultrasound in diagnosis of structural fetal anomalies with special focus on false positive findings (I), to evaluate the additional value of second trimester fetal MRI on pregnancy management (II-III) and to estimate the ascertainment in the Swedish Birth Defects Registry and incidence of spina bifida and cleft lip/palate (IV).Retrospectively, 328 fetal autopsies were identified where pregnancies were terminated due to ultrasonographically diagnosed fetal anomalies. READ MORE

  4. 4. Statistical genetic analysis of family data

    University dissertation from Stockholm : Karolinska Institutet, Department of Medical Epidemiology and Biostatistics

    Author : Benjamin H Yip; Karolinska Institutet.; Karolinska Institutet.; [2008]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Variance component; ascertainment; population-based family data; Generalized linear mixed model; binary trait; quantitative genetics;

    Abstract : The importance of genetic determinants and risk factors of diseases has been consistently recognized in genetic epidemiology, which is one of the fastest growing areas in genomic medicine. Familial clustering is a common characteristic of genetic related phenotypes, providing vital insights into the etiology of diseases by establishing the relative contribution of genetic and environmental factors. READ MORE

  5. 5. Methodological aspects on excess cancer riskafter exposure to ionizing radiation

    University dissertation from Stockholm : Karolinska Institutet, Department of Medical Epidemiology and Biostatistics

    Author : Erik Holmberg; Göteborgs universitet.; Gothenburg University.; [2004]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ionizing radiation; skin haemangioma; breast cancer; parathyroid adenoma; excess cancer risk; bias; confounding; risk models; pooled analysis.;

    Abstract : Aims. The aims of this study were to establish a cohort of persons treated with radiotherapy for skin haemangioma in childhood and study the excess risk of cancer after exposure to ionizing radiation. READ MORE