Sökning: "Inverse probability of treatment weighting"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Inverse probability of treatment weighting.

  1. 1. Some Aspects of Propensity Score-based Estimators for Causal Inference

    Författare :Ronnie Pingel; Johan Lyhagen; Theis Lange; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; correlation; treatment effect; inverse probability weighting; local linear estimator; matching; multicollinearity; observational study.; Statistics; Statistik;

    Sammanfattning : This thesis consists of four papers that are related to commonly used propensity score-based estimators for average causal effects.The first paper starts with the observation that researchers often have access to data containing lots of covariates that are correlated. LÄS MER

  3. 2. Treatment and logistics of acute ischemic stroke : safety and outcomes

    Författare :Boris Keselman; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Background: Stroke, both ischemic and hemorrhagic, accounts for over 20000 hospital admissions in Sweden yearly. The vast majority of patients (85%), suffer from ischemic stroke, an occlusion of a cerebral artery that can be treated pharmacologically with systemic intravenous thrombolysis (IVT) or mechanically with endovascular thrombectomy (EVT). LÄS MER

  4. 3. Epidemiological studies of bioprosthetic aortic valves

    Författare :Michael Dismorr; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Background: The use of bioprosthetic valves is common and offers a prosthetic option that does not require anti-coagulant therapy, but with shorter valve longevity compared to mechanical prostheses. Valve model selection might influence the long-term performance of the prosthesis. LÄS MER

  5. 4. Pharmacoepidemiological studies of rheumatoid arthritis : methodological considerations and applications

    Författare :Andrei Barbulescu; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Study I – Biological disease-modifying anti-rheumatic drugs (DMARDs) and the risk of gastrointestinal perforations: Study I was motivated by previous signals of an increased risk of lower gastro-intestinal perforations among rheumatoid arthritis (RA) patients treated with tocilizumab. The primary aim of study I was to compare the incidence of lower gastro-intestinal perforations between RA patients initiating the biological DMARDs tocilizumab, abatacept, rituximab and tumor necrosis factor inhibitors (TNFi). LÄS MER

  7. 5. Bloody big data : ensuring the health of blood donors and transfused patients with health registers

    Författare :Jingcheng Zhao; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Blood transfusion is widely considered a pillar of modern medicine and is one of the most common medical interventions. A transfusion intimately links two persons and their health through the altruism of blood donors. In turn, this has necessitated the development of rigorous safety measures for both donors and recipients. LÄS MER