Results 11 to 20 of about 1,049,088 (304)

Understanding COVID-19 Vaccine Effectiveness against Death Using a Novel Measure: COVID Excess Mortality Percentage

open access: yesVaccines, 2023
COVID-19 vaccines have saved millions of lives; however, understanding the long-term effectiveness of these vaccines is imperative to developing recommendations for booster doses and other precautions. Comparisons of mortality rates between more and less
Vladimir Atanasov   +9 more
doaj   +1 more source

Who needs selection bias?

open access: yesScandinavian Journal of Work, Environment & Health, 2014
Present day low participation rates in certain parts of research is concerning. It is not unusual that half (or even more) of those invited to participate in a research project decline the invitation.
Jørn Olsen
doaj   +1 more source

Scientific Research or Advocacy? Emotive Labels and Selection Bias Confound Survey Results

open access: yesEcology and Society, 2000
Robert Costanza presents four compelling visions of the future, but the language he uses to describe them is emotive and value-laden and may bias the survey results.
Jerome K. Vanclay
doaj   +1 more source

Relative age effect on student-athletes of Mato Grosso state (Brazil) participating in the National School Games depending on sex, age category, and sport type

open access: yesHuman Movement, 2022
Purpose The relative age effect (RAE) is a widely reported phenomenon in elite sports context. However, little is known about its occurrence in other levels of practice, such as school sports.
Henrique de Oliveira Castro   +7 more
doaj   +1 more source

Occupational segregation, selection effects and gender wage differences: evidence from urban Colombia

open access: yesApuntes del CENES, 2014
This paper assesses the effects of occupational segregation on the gender wage gap in urban Colombia between 1986 and 2000. The  empirical methodology involves a two step procedure where by the occupational distributions ofworkers by gender aremodelled ...
Jairo Guillermo Isaza Castro
doaj   +1 more source

An empirical evaluation of alternative approaches to adjusting for attrition when analyzing longitudinal survey data on young adults' substance use trajectories

open access: yesInternational Journal of Methods in Psychiatric Research, 2022
Objectives Longitudinal survey data allow for the estimation of developmental trajectories of substance use from adolescence to young adulthood, but these estimates may be subject to attrition bias.
Yajuan Si   +7 more
doaj   +1 more source

Accounting for biases in survey-based estimates of population attributable fractions

open access: yesPopulation Health Metrics, 2019
Background This paper discusses best practices for estimating fractions of mortality attributable to health exposures in survey data that are biased by observed confounders and unobserved endogenous selection.
Ryan Masters, Eric Reither
doaj   +1 more source

De-Selection Bias Recommendation Algorithm Based on Propensity Score Estimation

open access: yesApplied Sciences, 2023
There are various biases present in recommendation systems, and recommendation results that do not consider these biases are unfair to users, items, and platforms.
Teng Ma, Su Yu
doaj   +1 more source

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

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  

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