background & aim: purslane (portulaca oleracea l.), belongs to the portulacaceace family, grows in many parts of iran. results of previous studies were indicated purslane is a rich source of essential fatty acids of omega-3 and omega-6.  portulaca oleracea is a widespread weed, being the eighth common plants of the world. the aim of current study was to compare the essential fatty acids com...

background: empowerment of elderly people with chronic obstructive pulmonary disease (copd) can increase their quality of life and feeling of well-being. however, few researches focused on the obstacles and factors facilitating empowerment in elderly people with copd and an adequate determining of these factors need an in-depth understanding of the meaning of these factors which influences empo...

in recent decades, the issue of stress and its negative consequences such as violence in the workplace, increased accidents at work, absenteeism and burnout, have deleterious effects on the efficiency and economy. the aim of this study was to determine the occupational stress of pelletizing industry workers and its determinants. this study was descriptive-analytical and cross sectional. among w...

We read the article published by Androsz-Kowalska et al. [1] with great interest. They investigated the mean platelet volume (MPV) in patients with chronic periodontitis with coronary artery disease (CAD), chronic periodontitis without CAD, and control subjects. They found that MPV was significantly higher in patients with chronic periodontitis with CAD than in controls. However, there was no s...

Exploratory factor analysis involves five key decisions. The second decision, how many factors to retain, is the focus of the current paper. Extracting too many or too few factors often leads to devastating effects on study results. The advantages and disadvantages of the most effective and/or most utilized strategies to determine the number of factors to extract will be explored. Equipped with...