Results 21 to 30 of about 290,361 (291)

The Use of Multiple Imputation to Handle Missing Data in Secondary Datasets: Suggested Approaches when Missing Data Results from the Survey Structure

open access: yesInquiry: The Journal of Health Care Organization, Provision, and Financing, 2022
Secondary datasets are used in healthcare research because of its cost advantages, its convenience, and the size of the datasets. However, missing data can cause problems that are difficult to resolve.
Soojung Jo PhD, RN
doaj   +1 more source

A novel scaling methodology to reduce the biases associated with missing data from commercial activity monitors.

open access: yesPLoS ONE, 2020
BackgroundCommercial physical activity monitors have wide utility in the assessment of physical activity in research and clinical settings, however, the removal of devices results in missing data and has the potential to bias study conclusions.
R O'Driscoll   +8 more
doaj   +1 more source

A note on multiple imputation for method of moments estimation [PDF]

open access: yes, 2015
Multiple imputation is a popular imputation method for general purpose estimation. Rubin(1987) provided an easily applicable formula for the variance estimation of multiple imputation.
Kim, Jae Kwang   +2 more
core   +4 more sources

A comparison of imputation methods for categorical data

open access: yesInformatics in Medicine Unlocked, 2023
Objectives: Missing data is commonplace in clinical databases, which are being increasingly used for research. Without giving any regard to missing data, results from analysis may become biased and unrepresentative.
Shaheen MZ. Memon   +2 more
doaj   +1 more source

The R Package hmi: A Convenient Tool for Hierarchical Multiple Imputation and Beyond

open access: yesJournal of Statistical Software, 2020
Applications of multiple imputation have long outgrown the traditional context of dealing with item nonresponse in cross-sectional data sets. Nowadays multiple imputation is also applied to impute missing values in hierarchical data sets, address ...
Matthias Speidel   +2 more
doaj   +1 more source

Multiple Imputation [PDF]

open access: yesJAMA, 2015
In this issue of JAMA, Asch et al1 report results of a cluster-randomized clinical trial designed to evaluate the effects of physician financial incentives, patient incentives, or shared physician and patient incentives on low density lipoprotein cholesterol (LDL-C) levels among patients with high cardiovascular risk.
Peng, Li   +2 more
openaire   +3 more sources

Effects of Different Missing Data Imputation Techniques on the Performance of Undiagnosed Diabetes Risk Prediction Models in a Mixed-Ancestry Population of South Africa. [PDF]

open access: yesPLoS ONE, 2015
Imputation techniques used to handle missing data are based on the principle of replacement. It is widely advocated that multiple imputation is superior to other imputation methods, however studies have suggested that simple methods for filling missing ...
Katya L Masconi   +3 more
doaj   +1 more source

Recovery of information from multiple imputation: a simulation study

open access: yesEmerging Themes in Epidemiology, 2012
Background Multiple imputation is becoming increasingly popular for handling missing data. However, it is often implemented without adequate consideration of whether it offers any advantage over complete case analysis for the research question of ...
Lee Katherine J, Carlin John B
doaj   +1 more source

Model checking in multiple imputation: an overview and case study

open access: yesEmerging Themes in Epidemiology, 2017
Background Multiple imputation has become very popular as a general-purpose method for handling missing data. The validity of multiple-imputation-based analyses relies on the use of an appropriate model to impute the missing values.
Cattram D. Nguyen   +2 more
doaj   +1 more source

How handling missing data may impact conclusions: A comparison of six different imputation methods for categorical questionnaire data

open access: yesSAGE Open Medicine, 2019
Objectives: Missing data is a recurrent issue in many fields of medical research, particularly in questionnaires. The aim of this article is to describe and compare six conceptually different multiple imputation methods, alongside the commonly used ...
Marianne Riksheim Stavseth   +2 more
doaj   +1 more source

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