Search results for "health information"
showing 10 items of 202 documents
The Induced Smoothed lasso: A practical framework for hypothesis testing in high dimensional regression.
2020
This paper focuses on hypothesis testing in lasso regression, when one is interested in judging statistical significance for the regression coefficients in the regression equation involving a lot of covariates. To get reliable p-values, we propose a new lasso-type estimator relying on the idea of induced smoothing which allows to obtain appropriate covariance matrix and Wald statistic relatively easily. Some simulation experiments reveal that our approach exhibits good performance when contrasted with the recent inferential tools in the lasso framework. Two real data analyses are presented to illustrate the proposed framework in practice.
Nonlinear parametric quantile models
2020
Quantile regression is widely used to estimate conditional quantiles of an outcome variable of interest given covariates. This method can estimate one quantile at a time without imposing any constraints on the quantile process other than the linear combination of covariates and parameters specified by the regression model. While this is a flexible modeling tool, it generally yields erratic estimates of conditional quantiles and regression coefficients. Recently, parametric models for the regression coefficients have been proposed that can help balance bias and sampling variability. So far, however, only models that are linear in the parameters and covariates have been explored. This paper …
Segmented relationships to model erosion of regression effect in Cox regression
2010
In this article we propose a parsimonious parameterisation to model the so-called erosion of the covariate effect in the Cox model, namely a covariate effect approaching to zero as the follow-up time increases. The proposed parameterisation is based on the segmented relationship where proper constraints are set to accomodate for the erosion. Relevant hypothesis testing is discussed. The approach is illustrated on two historical datasets in the survival analysis literature, and some simulation studies are presented to show how the proposed framework leads to a test for a global effect with good power as compared with alternative procedures. Finally, possible generalisations are also present…
On powerful exact nonrandomized tests for the Poisson two-sample setting.
2020
In the case of two independent samples from Poisson distributions, the natural target parameter for hypothesis testing is the ratio of the two population means. The conditional tests which have been derived for this class of problems already in the 1940s are well known to be optimal in terms of power only when randomized decisions between hypotheses are admitted at the boundary of the respective rejection regions. The major objective of this contribution is to show how the approach used by Boschloo in 1970 for constructing a powerful nonrandomized version of Fisher’s exact test for hypotheses about the odds ratio between two binomial parameters can successfully be adapted for the Poisson c…
Information behaviour of the millennial generation: a scoping review of medical residents and their use of social media.
2018
Background Medical residents can offer ideas for new information services, as most of them are 'digital natives', although reviews of the use of social media in health care settings do not provide data on their information behaviour. Objective A scoping review aimed at providing a research map for the information behaviour of medical residents and their use of social media, listing the aspects of the information behaviour studied and the theories and methods used. Methods A search was carried out in pubmed, embase, cinahl and lisa in April of 2018, with the results limited to the period from 2010 onwards. Results Thirty-nine relevant articles from 38 different studies were identified. The p…
The EU-project United4Health: User-centred design of an information system for a Norwegian telemedicine service.
2015
Introduction Organizational changes of health care services in Norway brought to light a need for new clinical pathways. This study presents the design and evaluation of an information system for a new telemedicine service for chronic obstructive pulmonary disease patients after hospital discharge. Methods A user-centred design approach was employed composed of a workshop with end-users, two user tests and a field trial. For data collection, qualitative methods such as observations, semi-structured interviews and a questionnaire were used. Results User workshop’s outcome informed the implementation of the system initial prototype, evaluated by end-users in a usability laboratory. Several us…
Telemedicine: Economic and clinical evaluation of the management of ischemic stroke
2017
Summary Introduction Ischemic stroke (IS) is a therapeutic emergency that requires prompt care in a stroke unit (SU). In order to reduce regional inequalities and to promote uniformity in access to this technique, which is effective when carried out quickly, telemedicine-assisted thrombolysis was developed in Burgundy within the Telestroke system. At the moment, no study compared costs (i.e. expenditures) and revenues (i.e. funding) associated with the management of patients presenting an IS in Burgundy after the implementation of the Telestroke system according to the management strategy: patients undergoing thrombolysis directly in a SU or Tele-thrombolysis in a local hospital (LH) receiv…
Could telemedicine enhance traditional medicine practices?
2014
International audience; In developing countries, telemedicine and mobile health tools promise to enhance access to high-quality healthcare, to support communication of medical information and to assist pharmacovigilance processes. In this article, we provide some arguments on the potential of telemedicine and mobile health (mHealth) applications to improve the delivery of health care in rural African regions. Specifically, the development of mobile telemedicine could help to lay the foundations of a healthcare approach integrating modern medical knowledge with ancient medical practices on the African continent. Access to information and communication technology (ICT), technical devices or p…
Accuracy and Completeness of Drug Information in Wikipedia: A Comparison with Standard Textbooks of Pharmacology
2014
The online resource Wikipedia is increasingly used by students for knowledge acquisition and learning. However, the lack of a formal editorial review and the heterogeneous expertise of contributors often results in skepticism by educators whether Wikipedia should be recommended to students as an information source. In this study we systematically analyzed the accuracy and completeness of drug information in the German and English language versions of Wikipedia in comparison to standard textbooks of pharmacology. In addition, references, revision history and readability were evaluated. Analysis of readability was performed using the Amstad readability index and the Erste Wiener Sachtextforme…
Physicians’ motivations to use mobile health monitoring:a cross-country comparison
2016
While mobile device receives increasing attention as a practical tool to remotely check patients’ health, little research has shed light on physicians’ acceptance of this information and communication technology. This study attempts to fill this research gap by examining how Japanese and Spanish physicians perceive a series of factors associated with mobile diabetes monitoring acceptance, and whether any differences exist in these perceptions between the countries due to different levels of physician scarcity, which is operationalised as the number of physicians available per 10,000 population. The hypotheses were tested by empirical surveys in Japan and Spain. In total, 471 and 497 usable …