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Lena Osterhagen

Bio: Lena Osterhagen is an academic researcher. The author has contributed to research in topics: Server. The author has an hindex of 1, co-authored 1 publications receiving 3975 citations.
Topics: Server

Papers
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01 Jan 2016
TL;DR: The multiple imputation for nonresponse in surveys is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can download it instantly.
Abstract: multiple imputation for nonresponse in surveys is available in our book collection an online access to it is set as public so you can download it instantly. Our book servers hosts in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the multiple imputation for nonresponse in surveys is universally compatible with any devices to read.

5,470 citations


Cited by
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Journal ArticleDOI
TL;DR: In virtually all medical domains, diagnostic and prognostic multivariable prediction models are being developed, validated, updated, and implemented with the aim to assist doctors and individuals in estimating probabilities and potentially influence their decision making.
Abstract: The TRIPOD (Transparent Reporting of a multivariable prediction model for Individual Prognosis Or Diagnosis) Statement includes a 22-item checklist, which aims to improve the reporting of studies developing, validating, or updating a prediction model, whether for diagnostic or prognostic purposes. The TRIPOD Statement aims to improve the transparency of the reporting of a prediction model study regardless of the study methods used. This explanation and elaboration document describes the rationale; clarifies the meaning of each item; and discusses why transparent reporting is important, with a view to assessing risk of bias and clinical usefulness of the prediction model. Each checklist item of the TRIPOD Statement is explained in detail and accompanied by published examples of good reporting. The document also provides a valuable reference of issues to consider when designing, conducting, and analyzing prediction model studies. To aid the editorial process and help peer reviewers and, ultimately, readers and systematic reviewers of prediction model studies, it is recommended that authors include a completed checklist in their submission. The TRIPOD checklist can also be downloaded from www.tripod-statement.org.

2,982 citations

Journal ArticleDOI
TL;DR: This article discusses alternatives to single-step mixture modeling for latent class predictor variables in several different settings, including latent class analysis, latent transition analysis, and growth mixture modeling.
Abstract: This article discusses alternatives to single-step mixture modeling. A 3-step method for latent class predictor variables is studied in several different settings, including latent class analysis, latent transition analysis, and growth mixture modeling. It is explored under violations of its assumptions such as with direct effects from predictors to latent class indicators. The 3-step method is also considered for distal variables. The Lanza, Tan, and Bray (2013) method for distal variables is studied under several conditions including violations of its assumptions. Standard errors are also developed for the Lanza method because these were not given in Lanza et al. (2013).

2,089 citations

Journal ArticleDOI
TL;DR: In this observational study involving patients with Covid-19 who had been admitted to the hospital, hydroxychloroquine administration was not associated with either a greatly lowered or an increased risk of the composite end point of intubation or death.
Abstract: Background Hydroxychloroquine has been widely administered to patients with Covid-19 without robust evidence supporting its use. Methods We examined the association between hydroxychloroqu...

1,357 citations

Journal ArticleDOI
TL;DR: The widely held assumptions that blood pressure has strong associations with the occurrence of all cardiovascular diseases across a wide age range, and that diastolic and systolic associations are concordant, are not supported by the findings of this high-resolution study.

1,220 citations

Journal ArticleDOI
TL;DR: Although the mortality reduction was not significant in the primary analysis, it was noted a significant mortality reduction with MMS when prevalent cases were excluded, and encouraging evidence of a mortality reduction in years 7–14 was noted.

756 citations