Results 21 to 30 of about 2,780,395 (295)

Selection Bias, Confounding, or Information Bias? [PDF]

open access: yesHypertension, 2007
To the Editor, As a public health advocate against tobacco use, I find the recent article by Jatoi et al1 interesting and quite informative. As an epidemiologist, I also have a few concerns surrounding the methodologic issues of such study findings. One of the most essential components of a comprehensive tobacco control program is to disseminate the ...
openaire   +2 more sources

Case-Control Studies

open access: yesKerala Journal of Psychiatry, 2021
Case-control studies (CSS) are observational analytic studies done often in instances of rare cases or outcomes.  In a case-control study, clearly defined cases and controls arising from the same population is compared for well-measured exposures.
Pankajakshan Vijayanthi Indu   +1 more
doaj   +1 more source

Consequences de la sélection de variables sur l'interprétation des résultats en régression linéaire multiple [PDF]

open access: yesBiotechnologie, Agronomie, Société et Environnement, 2005
Consequences of variable selection on the interpretation of the results in multiple linear regression. A priori or a posteriori variable selection is a common practise in multiple linear regression.
Palm R., Akossou AYJ.
doaj  

Avoiding selection bias in gravitational wave astronomy

open access: yesNew Journal of Physics, 2013
When searching for gravitational waves in the data from ground-based gravitational wave detectors, it is common to use a detection threshold to reduce the number of background events which are unlikely to be the signals of interest.
C Messenger, J Veitch
doaj   +1 more source

The reporting of methods for reducing and detecting bias: an example from the WHO Misoprostol Third Stage of Labour equivalence randomised controlled trial

open access: yesBMC Medical Research Methodology, 2003
Background The aim of this article is to explore ways in which selection bias and ascertainment bias can be reduced and investigated in trials, by using the example of a drug trial carried out in both developed and developing countries in hospital ...
Pinol Alain PY   +5 more
doaj   +1 more source

Selective Inference for Testing Trees and Edges in Phylogenetics

open access: yesFrontiers in Ecology and Evolution, 2019
Selective inference is considered for testing trees and edges in phylogenetic tree selection from molecular sequences. This improves the previously proposed approximately unbiased test by adjusting the selection bias when testing many trees and edges at ...
Hidetoshi Shimodaira   +3 more
doaj   +1 more source

randomizeR: An R Package for the Assessment and Implementation of Randomization in Clinical Trials

open access: yesJournal of Statistical Software, 2018
Randomization in clinical trials is the key design technique to ensure the comparability of treatment groups. Although there exist a large number of software products which assist the researcher to implement randomization, no tool which would cover a ...
Diane Uschner   +3 more
doaj   +1 more source

An Information-Theoretic Measure for Balance Assessment in Comparative Clinical Studies

open access: yesEntropy, 2020
Limitations of statistics currently used to assess balance in observation samples include their insensitivity to shape discrepancies and their dependence upon sample size.
Jarrod E. Dalton   +2 more
doaj   +1 more source

Response-Based Sampling for Binary Choice Models With Sample Selection

open access: yesEconometrics, 2018
Sample selection models attempt to correct for non-randomly selected data in a two-model hierarchy where, on the first level, a binary selection equation determines whether a particular observation will be available for the second level (outcome equation)
Maria Felice Arezzo   +1 more
doaj   +1 more source

Safety Net Design and Systemic Risk: New Empirical Evidence [PDF]

open access: yes, 2005
Recent econometric evidence has noticeably changed views on the desirability and the appropriate design of explicit Deposit Insurance Schemes (DIS). The purpose of this paper is to take a second look at the data. After surveying recent empirical work and
Klüh, Ulrich
core   +2 more sources

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