Results 1 to 10 of about 4,723,849 (166)
Non-response to baseline, non-response to follow-up and mortality in the Whitehall II cohort [PDF]
International Journal of Epidemiology, 2009 Little is known about the associations between non-response to follow-up surveys and mortality, or differences in these associations by socioeconomic position in studies with repeat data collections.The Whitehall II study of socioeconomic inequalities in health provided response status from five data collection surveys; Phase 1 (1985-88, n = 10 308 ...
J E Ferrie +2 more
exaly +6 more sources
Non-response bias in a lifestyle survey [PDF]
Journal of Public Health, 1997 Monitoring health targets is often undertaken using questionnaire surveys of lifestyle risk factors. Non-response bias is recognized but rarely quantified.Following a questionnaire survey on a random sample of 6009 residents of Somerset with a response rate of 57.6 per cent, a telephone survey was undertaken on a random sample of 400 non-responders.
Gunnell David
exaly +3 more sources
ABCC Gene Variants and Their Effects on Non-Response and Relapse in Pediatric Patients with Central Nervous System Tumors: A Cohort Study [PDF]
Current Issues in Molecular BiologyThe variability in outcomes among individuals is caused by multiple factors, including genetic variations in drug transporter genes known as ABCs. This study investigates the clinical effect of single-nucleotide variants (SNVs) in the ABCC1/MRP1, ABCC2 ...
Luz María Torres-Espíndola +8 more
doaj +2 more sources
Restructured searls family of estimators of population mean in the presence of nonresponse
Frontiers in Applied Mathematics and Statistics, 2022 Nonresponse is a major problem encountered by surveyors when conducting sampling surveys. The present study suggested a naïve modified Searls method for the elevated estimation of the population mean of the primary variable under investigation by ...
Abdullah Ali H. Ahmadini +3 more
doaj +1 more source
Survey Fatigue During the COVID-19 Pandemic: An Analysis of Neurosurgery Survey Response Rates
Frontiers in Surgery, 2021 Background: The COVID-19 pandemic has caused a surge in research activity while restricting data collection methods, leading to a rise in survey-based studies.
Rosaline de Koning +12 more
doaj +1 more source
In models we trust: preregistration, large samples, and replication may not suffice
Frontiers in Psychology, 2023 Despite discussions about the replicability of findings in psychological research, two issues have been largely ignored: selection mechanisms and model assumptions.
Martin Spiess, Pascal Jordan
doaj +1 more source
Mathematics, 2023 To gain insight into various phenomena of interest, cumulative distribution functions (CDFs) can be used to analyze survey data. The purpose of this study was to present an efficient ratiocum-exponential estimator for estimating a population CDF using ...
Ayesha Khalid +3 more
doaj +1 more source
Survey Non-Response and Unemployment Duration [PDF]
SSRN Electronic Journal, 2004 Social surveys are often used to estimate unemployment duration distributions. Survey non-response may then cause a bias. We study this by using a data set that combines survey information of individual workers with administrative records of the same workers.
Gerard J. van den Berg +2 more
openaire +8 more sources
An Efficient Estimation Procedure for the Population Mean under Non-Response
Statistica, 2020 This paper introduces an efficient estimation procedure for the population mean in the presence of non-response. The proposed estimators of population mean provides an improvement over the corresponding conventional estimators proposed by Cochran (1977),
Shashi Bhushan, Abhay Pratap Pandey
doaj +1 more source
Communications in Advanced Mathematical Sciences, 2023 Throughout this article, a two-phase sampling (TPS) technique is employed to estimate the population mean of the sensitive variable. The current article endeavours to develop a chain ratio type estimator for the estimation of sensitive variable(s) in the
Sunil Kumar, Sanam Preet Kour
doaj +1 more source