Results 241 to 250 of about 1,255,138 (288)

Study Design in Clinical and Epidemiologic Research: Observational, Experimental, and Beyond

Journal of Periodontal Research, EarlyView.
Population‐based epidemiology and clinical research are complementary and mutually reinforcing: Epidemiology quantifies disease incidence/prevalence and elucidates environmental and social determinants in populations, whereas clinical research evaluates biomarkers, therapeutics, and prognostic outcomes in patients; their convergence underpins ...
Gustavo G. Nascimento, Ignacio Leiva‐Escobar, Maria Clotilde Carra, Sebastian‐Edgar Baumeister   +3 more
wiley   +1 more source

From complexity to clarity: how directed acyclic graphs enhance the study design of systematic reviews and meta-analyses. [PDF]

Eur J Epidemiol
Dijk SW, Caulley LM, Hunink M, Labrecque J.   +3 more
europepmc   +1 more source

The association between COVID‐19 vaccines and bullous pemphigoid risk: A UK population‐based study

Journal of the European Academy of Dermatology and Venereology, EarlyView.
Mikolaj Swiderski, Yana Vinogradova, Matthew J. Ridd, Zenas Z. N. Yiu, Antonia Lloyd‐Lavery, Vibhore Prasad, Bruno Gran, Sonia Gran   +7 more
wiley   +1 more source

Decoding Causality in Periodontal Medicine: Background Factors and Other Sources of Uncertainty

Journal of Periodontal Research, EarlyView.
Philippe Bouchard
wiley   +1 more source

Periodontal Medicine and the Limitations of Linear Causality: Time for a Cybernetic Framework

Journal of Periodontal Research, EarlyView.
Tom Lonsdale
wiley   +1 more source

Mendelian randomization for multiple exposures and outcomes with Bayesian Directed Acyclic Graphs exploration and causal effects estimation

Zuber V, Cronjé T, Cai N, Gill D, Bottolo L.   +4 more
europepmc   +1 more source

Collapsibility for Directed Acyclic Graphs

Scandinavian Journal of Statistics, 2009
Abstract. Collapsibility means that the same statistical result of interest can be obtained before and after marginalization over some variables. In this paper, we discuss three kinds of collapsibility for directed acyclic graphs (DAGs): estimate collapsibility, conditional independence collapsibility and model collapsibility. Related to collapsibility,
Xie, Xianchao, Geng, Zhi
openaire   +3 more sources

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On counting homomorphisms to directed acyclic graphs

Journal of the ACM, 2006
It is known that if P and NP are different then there is an infinite hierarchy of different complexity classes that lie strictly between them. Thus, if P ≠ NP, it is not possible to classify NP using any finite collection of complexity classes. This situation has led to attempts to identify smaller classes of problems within NP where
Martin E. Dyer, Leslie Ann Goldberg, Mike Paterson   +2 more
openaire   +3 more sources

On Mergings in Acyclic Directed Graphs

SIAM Journal on Discrete Mathematics, 2019
Summary: Consider an acyclic directed graph \(G\) with sources \(s_1, s_2, \ldots,s_n\) and sinks \(r_1, r_2, \ldots, r_n\). For \(i=1, 2, \ldots,n\), let \(c_i\) denote the size of the minimum edge cut between \(s_i\) and \(r_i\), which, by Menger's theorem, implies that there exists a group of \(c_i\) edge-disjoint paths from \(s_i\) to \(r_i ...
openaire   +1 more source

Signed Directed Acyclic Graphs for Causal Inference

Journal of the Royal Statistical Society Series B: Statistical Methodology, 2010
Formal rules governing signed edges on causal directed acyclic graphs are described and it is shown how these rules can be useful in reasoning about causality. Specifically, the notions of a monotonic effect, a weak monotonic effect and a signed edge are
Tyler Vanderweele, James M Robins
exaly   +2 more sources