Results 11 to 20 of about 3,159,855 (305)

Analysis of Matched Cohort Data [PDF]

open access: yesThe Stata Journal: Promoting communications on statistics and Stata, 2004
Matching is occasionally used in cohort studies; examples include studies of twins and some studies of traffic crashes. Analysis of matched cohort data is not discussed in many textbooks or articles and is not mentioned in the Stata manuals. Risk ratios can be estimated using matched-pair cohort data with Stata's mcc command. We describe a new command,
Peter Cummings, Barbara McKnight
openaire   +2 more sources

Matched Versus Unmatched Analysis of Matched Case-Control Studies

open access: yesAmerican Journal of Epidemiology, 2021
Abstract Although the need for addressing matching in the analysis of matched case-control studies is well established, debate remains as to the most appropriate analytical method when matching on at least 1 continuous factor. We compared the bias and efficiency of unadjusted and adjusted conditional logistic regression (CLR) and ...
Fei, Wan   +2 more
openaire   +3 more sources

Analysis of stochastic matching markets [PDF]

open access: yesInternational Journal of Game Theory, 2012
This paper deals with analysis of stochastic matching markets. Firstly the authors study the convergence to stability. It is shown that starting from an arbitrary matching of a solvable stable roommates (SR) instance one can always find a stable matching by successively satisfying blocking pairs; and that starting from an arbitrary matching of an ...
Biró, Péter, Norman, Gethin
openaire   +4 more sources

Birth outcomes following antiretroviral exposure during pregnancy: Initial results from a pregnancy exposure registry in South Africa

open access: yesSouthern African Journal of HIV Medicine, 2019
Background: In 2013, a pregnancy exposure registry and birth defects surveillance (PER/BDS) system was initiated in eThekwini District, KwaZulu-Natal (KZN), to assess the impact of antiretroviral treatment (ART) on birth outcomes. Objectives: At the end
Ushma C. Mehta   +13 more
doaj   +1 more source

First Offensive Shot in Elite Table Tennis

open access: yesInternational Journal of Racket Sports Science, 2021
At the (very) first shots in table tennis, players face a basic tactical decision: either return the ball short and passively or attack it with an offensive shot. In the first case, there is lower risk but no pressure for making the point, in the second
Michael Fuchs, Martin Lames
doaj   +1 more source

Soccer: is scoring goals a predictable Poissonian process? [PDF]

open access: yes, 2000
The non-scientific event of a soccer match is analysed on a strictly scientific level. The analysis is based on the recently introduced concept of a team fitness (Eur. Phys. J. B 67, 445, 2009) and requires the use of finite-size scaling.
Chamblin, A.   +3 more
core   +3 more sources

Technical Analysis of 2007 and 2017 World Taekwondo Women and Men Championship Finals

open access: yesTürk Spor ve Egzersiz Dergisi, 2018
Purpose of this study is to compare the latest world championships with the old system and the latest world championship competitions with the new system, and to compare the competitions in two different systems by conducting activity and technical ...
Sevde Mavi Var
doaj   +1 more source

Salivary hormone concentrations and technical-tactical performance indicators in beach volleyball: Preliminary evidence

open access: yesFrontiers in Sports and Active Living, 2022
The present study aimed to investigate (i) differences in salivary testosterone and cortisol concentrations before, during, and after simulated beach volleyball match, depending on match outcome (winning vs.
Yago Costa   +7 more
doaj   +1 more source

Match running performance during fixture congestion in elite soccer: Research issues and future directions [PDF]

open access: yes, 2015
Match congestion in elite soccer has been proposed to result in residual fatigue and underperformance in ensuing competition due to insufficient recovery time.
Bradley, P.S.   +5 more
core   +1 more source

Clustering Performances in Elite Basketball Matches According to the Anthropometric Features of the Line-ups Based on Big Data Technology

open access: yesFrontiers in Psychology, 2022
The aims of this study were: 1) to conduct a descriptive analysis of the anthropometric features of the line-ups of strong teams (top 16) in the 2019 FIBA Basketball World Cup; 2) to group the line-ups mentioned above into different clusters based on ...
Xiao Xu, Mingxin Zhang, Qing Yi
doaj   +1 more source

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