Results 111 to 120 of about 42,911,517 (395)

Sample size estimation for case‐crossover studies

Statistics 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, Joo‐Yeon Lee, Rima Izem   +2 more
openaire   +4 more sources

A Time-Stratified Case-Crossover Study of Ambient Ozone Exposure and Emergency Department Visits for Specific Respiratory Diagnoses in California (2005–2008)

Environmental Health Perspectives, 2015
Background: Studies have explored ozone’s connection to asthma and total respiratory emergency department visits (EDVs) but have neglected other specific respiratory diagnoses despite hypotheses relating ozone to respiratory infections and allergic ...
B. Malig, Dharshani Pearson, Y. Chang, R. Broadwin, R. Basu, Rochelle S. Green, B. Ostro   +6 more
semanticscholar   +1 more source

Emergent Spin‐Glass Behavior in an Iron(II)‐Based Metal–Organic Framework Glass

Advanced Functional Materials, EarlyView.
A one‐pot, solvent‐free synthesis yields an Fe2+‐based metal‐organic framework (MOF) glass featuring a continuous random network structure. The material exhibits spin‐glass freezing at 14 K, driven by topological‐disorder and short‐range magnetic frustration, showcasing the potential of MOF glasses as a plattform for cooperative magnetic phenomena in ...
Chinmoy Das, Soma Salamon, Joachim Landers, Jan‐Benedikt Weiß, Wen‐Long Xue, Pascal Kolodzeiski, Roman Pallach, Heiko Wende, Sebastian Henke   +8 more
wiley   +1 more source

Risk of Heart Failure Hospitalization Associated With Cilostazol in Diabetes: A Nationwide Case–Crossover Study

Frontiers in Pharmacology, 2019
Background and Objective: It has been suggested to avoid cilostazol, the first-line therapy for peripheral arterial disease, in patients with congestive heart failure (HF). The objective of this study was to evaluate the risk of hospitalization for heart
Cho-Kai Wu, Cho-Kai Wu, Jou-Wei Lin, Jou-Wei Lin, Li-Chiu Wu, Chia-Hsuin Chang, Chia-Hsuin Chang, Chia-Hsuin Chang   +7 more
doaj   +1 more source

Pharmacodynamic differences between canagliflozin and dapagliflozin: results of a randomized, double‐blind, crossover study

Diabetes, obesity and metabolism, 2015
To compare the pharmacodynamic effects of the highest approved doses of the sodium glucose co‐transporter 2 (SGLT2) inhibitors canagliflozin and dapagliflozin on urinary glucose excretion (UGE), renal threshold for glucose excretion (RTG) and ...
S. Sha, D. Polidori, Kristin Farrell, Atalanta Ghosh, Jaya Natarajan, Nicole Vaccaro, J. Pinheiro, Paul Rothenberg, L. Plum-Mörschel   +8 more
semanticscholar   +1 more source

Universal Neuromorphic Element: NbOx Memristor with Co‐Existing Volatile, Non‐Volatile, and Threshold Switching

Advanced Functional Materials, EarlyView.
A W/NbOx/Pt memristor demonstrates the coexistence of volatile, non‐volatile, and threshold switching characteristics. Volatile switching serves as a reservoir computing layer, providing dynamic short‐term processing. Non‐volatile switching, stabilized through ISPVA, improves reliable long‐term readout. Threshold switching operates as a leaky integrate
Ungbin Byun, Hyesung Na, Sungjun Kim
wiley   +1 more source

Ambient Heat and Sudden Infant Death: A Case-Crossover Study Spanning 30 Years in Montreal, Canada

Environmental Health Perspectives, 2015
Background Climate change may lead to more severe and extreme heat waves in the future, but its potential impact on sudden infant death—a leading cause of infant mortality—is unclear.
N. Auger, W. Fraser, A. Smargiassi, T. Kosatsky   +3 more
semanticscholar   +1 more source

Effective Sliding Motions of Vibration‐Induced Emission Stoppers in Mechanically Interlocked Molecules as Artificial Muscle Tougheners and In Situ Molecular Shuttling Sensors for Self‐Healable Mechano‐Fluorescent Polyurethane Organogels

Advanced Functional Materials, EarlyView.
The self‐healable ratiometric mechano‐fluorescent polyurethane (PU) organogel is constructed by incorporating a minor amount (ca. 1.5 wt.%) of the unconventional daisy chain rotaxane (as an artificial molecular muscle toughener) with specific sliding motions and ratiometric emission behaviors into the PU skeleton, which reveals the progressed intrinsic
Tu Thi Kim Cuc, Yu‐Chen Lai, Trang Manh Khang, Wei‐Tsung Chuang, Tung‐Kung Wu, Ricardas Rotomskis, Simona Steponkiene, Hong‐Cheu Lin   +7 more
wiley   +1 more source

Sample size re-estimation in crossover trials: application to the AIM HY-INFORM study

Trials, 2019
Background Crossover designs are commonly utilised in randomised controlled trials investigating treatments for long-term chronic illnesses. One problem with this design is its inherent repeated measures necessitate the availability of an estimate of the
Julie Wych, Michael J. Grayling, Adrian P. Mander   +2 more
doaj   +1 more source

Statistical properties of chaotic microcavities in small and large opening cases

, 2019
We study the crossover behavior of statistical properties of eigenvalues in a chaotic microcavity with different refractive indices. The level spacing distributions change from Wigner to Poisson distributions as the refractive index of a microcavity ...
Kim, Sang Wook, Ryu, Jung-Wan
core