purpose the objective of this study was to compare the iranian taekwondo-in statistically in terms of total injury rates to international counterparts as gleaned from the extant literature. methods the iranian sample consisted of 204 male taekwondo-in participating in the national championship. the international sample included the participants in national and international tournaments. validat...

OBJECTIVES To assess whether delaying risk reduction treatment has a different impact on potential life years lost in younger compared with older patients at the same baseline short-term cardiovascular risk. DESIGN Modelling based on population data. METHODS Potential years of life lost from a 5-year treatment delay were estimated for patients of different ages but with the same cardiovascu...

Portfolio and asset pricing theory use symmetric volatility measures to evaluate risk. We propose a method to isolate the risk that the portfolio suffers a loss, separate from the risk that the portfolio reaps uncommon gains. Specifically we take advantage of the one-sided nature of option payments and show how downside risk will only affect the value of a put option (with correctly specified s...

The interest in risk prediction using genomic profiles has surged recently. A proper interpretation of effect size measures in association studies is crucial to accurate risk prediction. In this study, we clarified the relationship between the odds ratio (OR), relative risk and incidence rate ratios in the context of genetic association studies. We demonstrated that under the common practice of...

Nearly one in three security practitioners believe that the organization they work for under-funds information security efforts. Rational choice and economic models have been developed to help decision makers determine the optimal amount they should spend to protect a set of information assets. These models presume investment decisions are rationally made, despite long-standing behavioral and d...

OBJECTIVE Conventional survival estimates may be biased if loss to follow-up (LTF) is associated with the outcome of interest. Our goal was to assess whether the association between sexual risk behavior and HIV-1 acquisition changed after accounting for LTF with competing risks regression. METHODS HIV-1-seronegative women who enrolled in a Kenyan sex worker cohort from 1993-2007 were followed...

background :older adults with cerebrovascular accident (cva) show evidence of auditory and speech perception problems. in present study, it was examined whether these problems are due to impairments of concurrent auditory segregation procedure which is the basic level of auditory scene analysis and auditory organization in auditory scenes with competing sounds. methods : concurrent auditory seg...

background & aim: we aimed to describe a standard survival analysis, so that we can analyze some factors related to the time of occurrence of different types of reflux (unilateral-left, unilateralright, and bilateral) in children with antenatal hydronephrosis (anh) and to provide an approach taking competing risks into account. methods & materials: we used data of 193 children that was collecte...

Background—No studies have compared first cardiovascular disease (CVD) events and non-CVD death between races in a competing risks framework, which examines risks for numerous events simultaneously. Methods and Results—We used competing Cox models to estimate hazards for first CVD events and non-CVD death within and between races in 3 multicenter, National Heart, Lung, and Blood Institute–spons...