Results 51 to 60 of about 6,418,358 (332)
BMC Medical Research Methodology, 2013 BackgroundDesigns and analyses of clinical trials with a time-to-event outcome almost invariably rely on the hazard ratio to estimate the treatment effect and implicitly, therefore, on the proportional hazards assumption.
P. Royston, M. Parmar
semanticscholar +1 more source
, 2007 <b>Background and Aim</b>: Surgical mortality in the US is widely perceived to be superior to that in the UK. However, previous comparisons of surgical outcome in the two countries have often failed to take sufficient account of case-mix or ...
Copley, L.P. +4 more
core +2 more sources
For-Profit Search Platforms [PDF]
, 2013 We consider optimal pricing by a profit-maximizing platform running a dynamic search and matching market. Buyers and sellers enter in cohorts over time, meet and bargain under private information.
Niedermayer, Andras, Shneyerov, Artyom
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Factors Affecting Nutritional Attitudes among University Adults [PDF]
Pakistan Journal of Commerce and Social Sciences, 2017 The problem of malnutrition has never been good and the information regarding nutrition would be advantageous particularly in case of Pakistan because significant progress of nutrition awareness at regional level is scarce.
Jamal Abdul Nasir
doaj
Association Between Atopic Keratoconjunctivitis and the Risk of Recurrent Corneal Erosion
Frontiers in Medicine, 2021 Purpose: To investigate the risk of recurrent corneal erosion (RCE) in patients with atopic keratoconjunctivitis (AKC).Methods: This national, retrospective, matched cohort study enrolled 184,166 newly-diagnosed AKC patients, selected from the Taiwan ...
Ren-Long Jan +9 more
doaj +1 more source
Risk related to pre–diabetes mellitus and diabetes mellitus in heart failure with reduced ejection fraction: insights from prospective comparison of ARNI with ACEI to determine impact on global mortality and morbidity in heart failure trial [PDF]
, 2016 Background—The prevalence of pre–diabetes mellitus and its consequences in patients with heart failure and reduced ejection fraction are not known.
Cardoso, José Silva +17 more
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A modified weighted log-rank test for confirmatory trials with a high proportion of treatment switching [PDF]
, 2020 In confirmatory cancer clinical trials, overall survival (OS) is normally a primary endpoint in the intention-to-treat (ITT) analysis under regulatory standards. After the tumor progresses, it is common that patients allocated to the control group switch
Bore, Alexander +3 more
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Population Ecology, EarlyView.Bear management changes management actions according to the horizontal axis of the population size and the vertical axis of the number of nuisance bears. Aiming for the target population size of Ntar, Actions I and II protect the bears, and Action IV reduces the population.
Hiroyuki Matsuda +5 more
wiley +1 more source
Frontiers in EndocrinologyObjectiveThis study aimed to quantify the severity of metabolic syndrome(MetS) and investigate its association with cardiovascular disease(CVD) risk on Chinese adults.Methods13,500 participants from the Zhejiang Adult Chronic Disease Study were followed ...
Jing-jing Lin +12 more
doaj +1 more source
Population Ecology, EarlyView.Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi +3 more
wiley +1 more source