Results 41 to 50 of about 7,367,624 (346)

Multi-Study R-Learner for Estimating Heterogeneous Treatment Effects Across Studies Using Statistical Machine Learning [PDF]

open access: yesarXiv, 2023
Estimating heterogeneous treatment effects (HTEs) is crucial for precision medicine. While multiple studies can improve the generalizability of results, leveraging them for estimation is statistically challenging. Existing approaches often assume identical HTEs across studies, but this may be violated due to various sources of between-study ...
arxiv  

Sample size estimation for case‐crossover studies

open access: yesStatistics in Medicine, 2018
Case‐crossover study designs are observational studies used to assess postmarket safety of medical products (eg, vaccines or drugs). As a case‐crossover study is self‐controlled, its advantages include better control for confounding because the design controls for any time‐invariant measured and unmeasured confounding and potentially greater ...
Sai Dharmarajan   +2 more
openaire   +4 more sources

Sub-Daily Exposure to Fine Particulate Matter and Ambulance Dispatches during Wildfire Seasons: A Case-Crossover Study in British Columbia, Canada

open access: yesEnvironmental Health Perspectives, 2020
Background: Exposure to fine particulate matter (PM2.5) during wildfire seasons has been associated with adverse health outcomes. Previous studies have focused on daily exposure, but PM2.5 levels in smoke events can vary considerably within 1 d ...
Jiayun Yao   +5 more
semanticscholar   +1 more source

Relativistic BCS-BEC crossover of a two-species Fermi gas with number density asymmetry at zero temperature [PDF]

open access: yes, 2009
We systematically study relativistic two-species fermions with tunable attractive interactions and number-density asymmetry at zero temperature. In general, a Bardeen-Cooper-Schrieffer (BCS) - Bose-Einstein Condensation (BEC) - relativistic BEC (RBEC ...
Chien, Chih-Chun, Guo, Hao, He, Yan
core   +1 more source

Automatically Finding and Categorizing Replication Studies [PDF]

open access: yesarXiv, 2023
In many fields of experimental science, papers that failed to replicate continue to be cited as a result of the poor discoverability of replication studies. As a first step to creating a system that automatically finds replication studies for a given paper, 334 replication studies and 344 replicated studies were collected.
arxiv  

From Little Things Big Things Grow: A Collection with Seed Studies for Medical Systematic Review Literature Search [PDF]

open access: yes, 2022
Medical systematic review query formulation is a highly complex task done by trained information specialists. Complexity comes from the reliance on lengthy Boolean queries, which express a detailed research question. To aid query formulation, information specialists use a set of exemplar documents, called `seed studies', prior to query formulation ...
arxiv   +1 more source

Global Persistence Exponent in Critical Dynamics: Finite Size induced Crossover [PDF]

open access: yes, 2007
We extend the definition of a global order parameter to the case of a critical system confined between two infinite parallel plates separated by a finite distance $L$.
D. Chakraborty   +3 more
core   +2 more sources

Association between Ambient Temperature and Hospitalization for Renal Diseases in Brazil during 2000–2015: A Nationwide Case-Crossover Study

open access: yesThe Lancet Regional Health. Americas, 2022
Summary: Background: Climate change is increasing the risks of injuries, diseases, and deaths globally. However, the association between ambient temperature and renal diseases has not been fully characterized.
Bo Wen   +6 more
doaj  

Antipsychotic medications and stroke in schizophrenia: A case-crossover study

open access: yesPLOS ONE, 2017
The association between antipsychotic use and the risk of stroke in schizophrenic patients is controversial. We sought to study the association in a nationwide cohort with schizophrenia.Using a retrospective cohort of patients with schizophrenia (N = 31,976) derived from the Taiwan National Health Insurance Research Database, 802 new-onset cases of ...
Chi-Shin Wu   +9 more
openaire   +6 more sources

Changes in drinking as predictors of changes in sickness absence: a case-crossover study [PDF]

open access: yesJournal of Epidemiology and Community Health, 2017
BackgroundWe investigated whether changes in alcohol use predict changes in the risk of sickness absence in a case-crossover design.MethodsFinnish public sector employees were surveyed in 2000, 2004 and 2008 on alcohol use and covariates. Heavy drinking was defined as either a weekly intake that exceeded recommendations (12 units for women; 23 for men)
Jenni Ervasti   +5 more
openaire   +8 more sources

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