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7,274 results for “Comparative studies”
A Randomized, Double-blind Controlled Study Comparing LCZ696 to Medical Therapy for Comorbidities in HFpEF Patients
ClinicalTrials.gov study NCT03066804. IPD Sharing: YES. Countries: 32. Publications: 1.
A Study to Assess the Effectiveness and Safety of Irinotecan Liposome Injection, 5-fluorouracil/Leucovorin Plus Oxaliplatin in Patients Not Previously Treated for Metastatic Pancreatic Cancer, Compare
ClinicalTrials.gov study NCT04083235. IPD Sharing: YES. Countries: 18. Publications: 1.
Study on an Investigational Yellow Fever Vaccine Compared With YF-VAX in Adults in the USA
ClinicalTrials.gov study NCT04942210. IPD Sharing: YES. Countries: 1. Publications: 0.
VERIFY:A Study to Compare Combination Regimen With Vildagliptin & Metformin Versus Metformin in Treatment-naïve Patients With Type 2 Diabetes Mellitus
ClinicalTrials.gov study NCT01528254. IPD Sharing: YES. Countries: 34. Publications: 5.
Study on a Quadrivalent Meningococcal Conjugate Vaccine (MenACYW Conjugate Vaccine) Compared to a Meningococcal Reference Vaccine, and When Given Alone or With Two Other Vaccines in Healthy Adolescent
ClinicalTrials.gov study NCT04490018. IPD Sharing: YES. Countries: 4. Publications: 1.
RAINBOW Study: RAnibizumab Compared With Laser Therapy for the Treatment of INfants BOrn Prematurely With Retinopathy of Prematurity
ClinicalTrials.gov study NCT02375971. IPD Sharing: UNDECIDED. Countries: 26. Publications: 2.
Data from: Levels of sex steroids in plethodontid salamanders: A comparative study within the genus Aneides
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How to render species comparable taxonomic units through deep time: A case study on intraspecific osteological variability in extant and extinct lacertid lizards
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A Bayesian extension of phylogenetic generalized least squares (PGLS): incorporating uncertainty in the comparative study of trait relationships and evolutionary rates
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Data from: Measuring nestedness: a comparative study of the performance of different metrics
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Supplementary datasets, data analysis code, and R tutorials for: Phylogenetic analysis of adaptation in comparative physiology and biomechanics: overview and a case study of thermal physiology in treefrogs
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Data for empirical example in: An effect size for comparing the strength of morphological integration across studies
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Supplementary material: How should functional relationships be evaluated using phylogenetic comparative methods? A case study using metabolic rate and body temperature
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Relationship of Community Characteristics to Harvest Reporting: Comparative study of household surveys and harvest tickets in Alaska
Accurate harvest reporting is critical for wildlife management. Rural Alaskan communities reported a median of 42% of moose harvested via traditional harvest tickets compared to those reported in household surveys. This harvest-report ratio did not change over time. Twice as many moose were reported harvested during subsistence household surveys (n = 8,039) than on hunter harvest tickets (n = 3,557). Percentage of the community that was indigenous, used and shared moose, and absence of a wildlife biologist or road access were associated with low harvest-report ratios. Analysis revealed that household surveys provide important information about moose harvest rates and their use should be expanded. Reporting rates might be improved by building trust through respectful dialogue between hunters and managers and by placing more emphasis on the benefits of reporting harvests and less emphasis on enforcement.
A comparative assessment of the dentoskeletal effects of clear aligners versus miniplate-supported posterior intrusion with fixed appliances in adult anterior open bite patients. A multi-centre, retrospective cohort study.
<p>In this retrospective study, the aim was to evaluate the dentoskeletal effects of clear aligner treatment (Invisalign®) versus miniplate-supported posterior intrusion (MSPI) in adults with anterior open bite.</p>
Opportunities and challenges in achieving co-management in marine protected areas in East Africa: a comparative case study
<p>As marine ecosystems decline globally, scientists recommend increasing the coverage of marine protected areas (MPAs), but many are not effectively managed to deliver benefits. Community integration into MPA decision-making can increase management effectiveness by supporting behaviour change, but this poses implementation challenges. We examine differences in adaptive capacity, community engagement, and perceived MPA benefits using interviews and focal group meetings with two fishing communities from MPAs with different management strategies and geographic settings: a centrally managed MPA in Kenya and a co-managed MPA in Tanzania. We hypothesized that perceptions of MPA benefits and MPA support would be higher among fishers and fish vendors in the more collaboratively designed system in Tanzania, and supported by greater adaptive capacity. Indeed, far fewer Kenyan participants (37%) felt they benefited from the MPA compared to Tanzanian participants (95%). However, agency and trust were largely similar and challenges existed in both systems that reduced collaborative action including low interaction/communication between staff and community, internal leadership challenges, and social conflict. We identified pathways towards improved co-management that transcend systems: institutional prioritization of community integration, investment in community leadership, mapping social networks during MPA establishment, and adequate staffing and operational budgets.</p>
Quantifying the effects of species traits on predation risk in nature: a comparative study of butterfly wing damage
<p>1) Evading predators is a fundamental aspect of the ecology and evolution of all prey animals. In studying the influence of prey traits on predation risk, previous researchers have shown that crypsis reduces attack rates on resting prey, predation risk increases with increased prey activity, and rapid locomotion reduces attack rates and increases chances of surviving predator attacks. However, evidence for these conclusions is nearly always based on observations of selected species under artificial conditions. In nature, it remains unclear how defensive traits such as crypsis, activity levels, and speed influence realized predation risk across species in a community. Whereas direct observations of predator-prey interactions in nature are rare, insight can be gained by quantifying bodily damage caused by failed predator attacks. 2) We quantified how butterfly species traits affect predation risk in nature by determining how defensive traits correlate with wing damage caused by failed predation attempts, thereby providing the first robust multi-species comparative analysis of predator-induced bodily damage in wild animals. 3) For 34 species of fruit-feeding butterflies in an African forest, we recorded wing damage and quantified crypsis, activity levels, and flight speed. We then tested for correlations between damage parameters and species traits using comparative methods that account for measurement error. 4) We detected considerable differences in the extent, location, and symmetry of wing surface loss among species, with smaller differences between sexes. We found that males (but not females) of species that flew faster had substantially less wing surface loss. However, we found no correlation between cryptic colouration and symmetrical wing surface loss across species. In species in which males appeared to be more active than females, males had a lower proportion of symmetrical wing surface loss than females. 5) Our results provide evidence that activity greatly influences the probability of attacks and that flying rapidly is effective for escaping pursuing predators in the wild, but we did not find evidence that cryptic species are less likely to be attacked while at rest. 15-Oct-2019</p>
Data from: The Odonate Phenotypic Database, a new open data resource for comparative studies of an old insect order
<p>We present The Odonate Phenotypic Database (OPD): an online data resource of dragonfly and damselfly phenotypes (Insecta: Odonata). Odonata is a relatively small insect order that currently consists of about 6400 species belonging to 32 families. The database consists of a variety of morphological, life-history and behavioral traits, and biogeographical information collected from literature sources. We see taxon-specific phenotypic databases from Odonata and other organismal groups as becoming an increasing valuable resource in comparative studies. Our database has phenotypic records for 1011 of all 6400 known odonate species. The database is accessible at <a href="http://www.odonatephenotypicdatabase.org/">http://www.odonatephenotypicdatabase.org/</a> and also uploaded as a supporting information file with this paper.</p> <p><strong>Update on November 6 2020</strong></p> <p>A total of 397 new taxa have been added to the database (aside from wing pigmentation data, many taxa have information on morphology, distribution and behaviour).</p> <p>Updated (validated) pigmentation status for 20 taxa (for these taxa, columns concerning wing pigment have been changed compared to the original opdb‐file, while all other columns have not been changed).</p>
Dataset for "Influence of curing temperature on belite cement hydration: a comparative study with Portland cement" paper
<p>Dataset for paper (doi: <a title="Persistent link using digital object identifier" href="https://doi.org/10.1016/j.cemconres.2021.106499" target="_blank" rel="noreferrer noopener"><span>https://doi.org/10.1016/j.cemconres.2021.106499</span></a>) with the abstract "Belite cements (BCs) could be a more sustainable binder than Portland cements (PCs) but adequate knowledge of the hydration features has still to be built. In particular, the mild curing hydration temperature effects have been extensively studied for PCs but not for BCs. This research was triggered by a previous work reporting improved mechanical strengths of BCs at higher curing temperatures. Here, we report the hydration characteristics of a BC at 20, 40 and 60ºC and compared to those of a typical PC. We have corroborated previous findings and used a multi-technique approach including Rietveld phase analysis, thermal analysis, calorimetry, silicon MAS-NMR, mercury intrusion porosimetry and chiefly synchrotron X-ray microtomography, to thoroughly understand the different behavior. In a nutshell, the improved mechanical performances at mild curing temperatures for BCs are due to a much larger belite degree of reaction without a significant porosity coarsening."</p>
Data in the analysis of Comparative Study of the Impact of Dummy Variables on Regression Coefficients and Canonical Correlation Indices: an Empirical perspective
<p>This data is used in the analysis related to the article Comparative Study of the Impact of Dummy Variables on Regression Coefficients and Canonical Correlation Indices: an Empirical perspective. The data contain Crude Oil Prices, Exchange Rates, and Dummy variables coded 1 for the era before the Covid-19 outbreak and 0 for the era of Covid-19.</p> <p> </p>
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.