Results 71 to 80 of about 91,945 (288)
Journal of Medical Internet Research, 2007 Background Attrition, or dropout, is a problem faced by many online health interventions, potentially threatening the inferential value of online randomized controlled trials.
Couper, Mick P +4 more
doaj +1 more source
Stop or Continue Data Collection: A Nonignorable Missing Data Approach for Continuous Variables
, 2017 We present an approach to inform decisions about nonresponse follow-up sampling. The basic idea is (i) to create completed samples by imputing nonrespondents' data under various assumptions about the nonresponse mechanisms, (ii) take hypothetical samples
Paiva, Thais, Reiter, Jerry
core
Prevalence of psychoactive substances in Dutch and Belgian traffic [PDF]
, 2012 Objective: The purpose of this study was to compare the prevalence of psychoactive substances in general traffic in The Netherlands and Belgium. Method: Randomly selected car drivers and drivers of small vans in six police regions in The Netherlands and ...
Brookhuis, Karel +5 more
core +2 more sources
Mechanisms of SCN2A loss of function do not predict presence or phenotype of epilepsy
Epilepsia, EarlyView.Abstract Objective SCN2A loss‐of‐function (LoF) variants are associated with epilepsy (onset age ≥ 3 months), intellectual disability (ID), and autism spectrum disorder (ASD). Despite numerous identified variants and the description of phenotypic subgroups, relationships between Nav1.2 channel dysfunction and clinical phenotypes remain unclear.
Marsha Tan +23 more
wiley +1 more source
Semiparametric response model with nonignorable nonresponse [PDF]
, 2018 How to deal with nonignorable response is often a challenging problem encountered in statistical analysis with missing data. Parametric model assumption for the response mechanism is often made and there is no way to validate the model assumption with ...
Kim, Jae Kwang +2 more
core +3 more sources
Journal of Forecasting, EarlyView.ABSTRACT Using online job advertisement data improves the timeliness and granularity depth of analysis in the labor market in domains not covered by official data. Specifically, its variation over time may be used as an anticipator of official employment variations.
Pietro Giorgio Lovaglio +1 more
wiley +1 more source
Respondent Behavior in Panel Studies: A Case Study for Income-Nonresponse by Means of the German Socio-Economic Panel (GSOEP) [PDF]
Many validation studies deal with item-nonresponse and measurement error in earnings data. In this paper we explore motives of respondents for the failure to reveal earnings using the German Socio-Economic Panel (GSOEP).
Jörg-Peter Schräpler
core
Practical implications of nonresponse bias in sample surveys : a thesis presented in partial fulfilment of the requirements for the degree of Master of Business Studies at Massey University [PDF]
, 1995 Researchers world-wide are concerned about a decline in survey response rates. One consequence of such a decline is the potential for increasing nonresponse bias.
Hosie, J. E. (Jessie E.)
core
Food Safety and Health, EarlyView.Community kitchen managers in Lebanon demonstrated positive attitudes but insufficient knowledge and perceptions regarding food safety. Targeted training programs are urgently needed to improve critical control practices and reduce foodborne illness risks across the country.
Samer A. Kharroubi +2 more
wiley +1 more source
Bounds on Quantiles in the Presence of Full and Partial Item Nonresponse [PDF]
Microeconomic surveys are usually subject to the problem of item nonresponse, typically associated with variables like income and wealth, where confidentiality and/or lack of accurate information can affect the response behavior of the individual. Follow
Melenberg, B. +2 more
core +1 more source