Sökning: "arvid sjölander"

Hittade 2 avhandlingar innehållade orden arvid sjölander.

1. 1. Causal inference in epidemiological research

   Författare :Arvid Sjölander; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Traditionally, statistics has been viewed as the branch of science which deals with association. Many epidemiological research questions, however, are concerned with causation, not association. In this thesis we develop novel statistical methodology to address four epidemiological problems properly, from a causal inference point of view. LÄS MER

3. 2. Uncertainty intervals and sensitivity analysis for missing data

   Författare :Minna Genbäck; Xavier de Luna; Elena Stanghellini; Arvid Sjölander; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; missing data; missing not at random; non-ignorable; set identification; uncertainty intervals; sensitivity analysis; self reported health; average causal effect; average causal effect on the treated; mixed-effects models; Statistics; statistik;

   Sammanfattning : In this thesis we develop methods for dealing with missing data in a univariate response variable when estimating regression parameters. Missing outcome data is a problem in a number of applications, one of which is follow-up studies. LÄS MER