منابع مشابه
Macular pigment and age-related macular degeneration: longitudinal data and better techniques of measurement are needed.
The past decade has witnessed an upsurge in interest in the carotenoid pigments of the macula. These pigments, collectively known as macular pigment (MP), are constituted by the oxycarotenoids lutein (L) and zeaxanthin (Z). MP possesses certain intrinsic properties, which has made it the focus of study by those interested in the aging macula. MP is not synthesized by the human body and is entir...
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Aspects of different approaches to study design in the epidemiology of sports injuries are presented, identifying 4 major types: (i) the clinical case series; (ii) the community-based survey; (iii) studies on specific sports or diagnoses without exposure data; and (iv) studies on specific sports or diagnoses with exposure data. The advantages and disadvantages of these concepts are discussed. I...
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Although many scholars have proposed all kinds of key successful factors (KSFs) for ERP activity to smoothly enhance the implementation of ERP, the KSFs are based too much on concept and protocol cannot help an enterprise to achieve this objective. Therefore, this research through qualitative interview method, integrating the KSFs and dynamic capability to set up a model so as to exhibit the ki...
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Despite intense study, the causes of breast cancer remain elusive (7). Reproductive factors are clearly of importance, but the nature of their influence on risk is complex and under continuous reassessment. It has been difficult to disentangle their effects because they are highly correlated and imperfect surrogates for unidentified underlying causal factors and because they are weakly related ...
متن کاملA New Nonparametric Regression for Longitudinal Data
In many area of medical research, a relation analysis between one response variable and some explanatory variables is desirable. Regression is the most common tool in this situation. If we have some assumptions for such normality for response variable, we could use it. In this paper we propose a nonparametric regression that does not have normality assumption for response variable and we focus ...
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ژورنال
عنوان ژورنال: Deutsches Aerzteblatt Online
سال: 2016
ISSN: 1866-0452
DOI: 10.3238/arztebl.2016.0615a