Zobrazeno 1 - 10
of 134
pro vyhledávání: '"J J, Koval"'
Publikováno v:
Clinical physiology and functional imaging. 38(4)
Summary Flow-mediated dilation (FMD) is calculated as the greatest percent change in arterial diameter following an ischaemic challenge. This Traditional %FMD calculation is thought to have statistical bias towards baseline diameter (Dbase), which is
Autor:
Timothy J. Bunning, J. J. Koval, N. Tabirian, Timothy J. White, Richard A. Vaia, Svetlana V. Serak, V. Grozhik, Lalgudi V. Natarajan, Vincent P. Tondiglia
Publikováno v:
Liquid Crystals XI.
We report on the photoactuation of high modulus liquid crystalline polymers with side chain azobenzene mesogens (azo-LCP). Photomechanical deformation is actuated with the 442 nm line of a He-Cd laser. Early results show that this system achieves dis
Publikováno v:
American Journal of Public Health. 87:1519-1521
OBJECTIVES: The aim of this study was to analyze the association of cigarette prices and no-smoking bylaws with the prevalence of smoking. METHODS: Data on individual smoking status were taken from two national household surveys in Canada. Current ci
Publikováno v:
Chronic diseases in Canada. 26(1)
This paper highlights the impact of survey weights on model fit in multiple linear regression with specific reference to the National Longitudinal Survey of Children and Youth (NLSCY) and provides recommendations for the treatment of influential obse
Publikováno v:
Experimental physiology. 85(6)
The purpose of this study was to use an allometric model (maximal oxygen uptake (VO2,max) = FFMbeta1 x PAbeta2 x exp(beta0 + beta3 age + beta4 sex) x epsilon) to determine the influence of fat-free mass (FFM), physical activity (PA), sex and age on V
Publikováno v:
Experimental physiology. 85(2)
The purpose of this study was to describe the influence of body size and sex on the decline in maximum oxygen uptake (O2,max) in older men and women. A stratified random sample of 152 men and 146 women, aged 55-86 years, was drawn from the study popu
Publikováno v:
Statistics in medicine. 19(11-12)
Investigation of the relationship of smoking and drinking to Alzheimer's disease (AD) may advance research on the cause of AD and provide a basis for treatment. Pharmacological mechanisms for an involvement of smoking and drinking are plausible but e
Autor:
N J, Blackman, J J, Koval
Publikováno v:
Statistics in medicine. 19(5)
Cohen's kappa statistic is a very well known measure of agreement between two raters with respect to a dichotomous outcome. Several expressions for its asymptotic variance have been derived and the normal approximation to its distribution has been us
Publikováno v:
Journal (Canadian Dental Association). 65(6)
Autor:
J J, Koval, L L, Pederson
Publikováno v:
Addictive behaviors. 24(2)
Smoking uptake by adolescents is best studied by a following a cohort of children as they proceed through adolescence. In this analysis of the first stage of such a study, several hypotheses about psychosocial factors that may modify the initiation o