Sökning: "observational method"
Visar resultat 21 - 25 av 162 avhandlingar innehållade orden observational method.
21. Covariate selection and propensity score specification in causal inference
Sammanfattning : This thesis makes contributions to the statistical research field of causal inference in observational studies. The results obtained are directly applicable in many scientific fields where effects of treatments are investigated and yet controlled experiments are difficult or impossible to implement. LÄS MER
22. Ultrasound measurement of cervical length in the second trimester of pregnancy for prediction of preterm delivery
Sammanfattning : Abstract Background: Short cervical length is a risk factor for preterm delivery (PTD) and screening of cervical length using transvaginal ultrasound in the second trimester is a proposed method to find women at risk Aims: To examine the potential value of routine measurement of cervical length in a Swedish population of women with singleton pregnancies in the prediction of PTD. To estimate inter- and intra-observer agreement and reliability of cervical length measurements. LÄS MER
23. How to create and analyze a Heart Failure Registry with emphasis on Anemia and Quality of Life
Sammanfattning : Background and aimsHeart failure (HF) is a major cause of serious morbidity and death in the population and one of the leading medical causes of hospitalization among people older than 60 years. The aim of this thesis was to describe how to create and how to analyze a Heart Failure Registry with emphasis on Anemia and Quality of Life. LÄS MER
24. Epidemiological aspects of cardiovascular morbidity and mortality among individuals with diabetes: the relative importance of cardiovascular risk factors
Sammanfattning : Background: Long-term trends of cardiovascular complications and death among patients with diabetes have not been studied extensively. In addition, we aimed to examine the effect of multifactorial risk factor control, as well as optimal levels- and relative importance of cardiovascular risk factors, in patients with type 1 diabetes and type 2 diabetes. LÄS MER
25. Upper airway surgery in obstructive sleep apnoea : descriptive, observational and randomised controlled studies
Sammanfattning : Obstructive sleep apnoea syndrome (OSAS) is a general health problem which causes daytime sleepiness, impaired quality of life and increased morbidity and mortality. A narrow upper airway anatomy is a common cause of OSAS, and tracheostomy was the initial surgical treatment for OSAS. LÄS MER