Search for dissertations about: "bias epidemiology"

Showing result 11 - 15 of 41 swedish dissertations containing the words bias epidemiology.

2. 11. Epidemiological aspects of the menopause

   Author : Kerstin Rödström; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Population study; menopause; epidemiology; hot flushes; hormone replacement therapy; secular trend; reproducibility;

   Abstract : During the time in a woman's life when menopause occurs, other changes, unrelated to the cessation of menstruation occur. Despite a large number of epidemiological studies, there is still conflicting information concerning the direct effects of the menopause as opposed to effects of aging per se and related psychosocial changes. READ MORE

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

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

   Abstract : 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. READ MORE

5. 13. Juvenile chronic arthritis. A study on epidemiology and outcome in Costa Rican children

   Author : Olga Arguedas; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Arthritis; juvenile; rheumatoid; juvenile chronic arthritis; epidemiology; outcome; disability evaluation; antinuclear antibodies; uveitis;

   Abstract : Problems associated with interpreting and comparing epidemiological studies dealing with chronic arthropathies in children include the diversity of classification criteria and selection bias. This study is a step towards elucidating the impact of genetic and environmental factors on disease frequencies and manifestations of Juvenile Chronic Arthritis (JCA) in Costa Rica. READ MORE

6. 14. Agnostic studies in epidemiology

   Author : Torsten Dahlén; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : In epidemiology there has been an consistent effort to construct refined methods aiming towards the ability to draw casual inference between an exposure and an outcome. This thesis, partly inspired by the genome-wide association studies, has on the contrary strived towards exploration of data. READ MORE

7. 15. Efficient strategies for collecting posture data using observation and direct measurement

   Author : Per Liv; Svend Erik Mathiassen; Marina Heiden; Leif Nilsson; Ingvar Bergdahl; Stephen Bao; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Exposure assessment; arm elevation; exposure variability; variance components; random effects model; precision; bias; sample size; sample allocation; calibration; bootstrapping; Occupational and Environmental Medicine; arbets- och miljömedicin;

   Abstract : Relationships between occupational physical exposures and risks of contracting musculoskeletal disorders are still not well understood; exposure-response relationships are scarce in the musculoskeletal epidemiology literature, and many epidemiological studies, including intervention studies, fail to reach conclusive results. Insufficient exposure assessment has been pointed out as a possible explanation for this deficiency. READ MORE