With the passage of the law on Continuing Medical education, the education of those covered by this law became official. Increasing the level of knowledge and professional skills of medical staff and improving the conditions of service provision is the most important goal of such education. Therefore, Continuing education in the medical community today is considered a fundamental principle, which is the mission of the Ministry of Health and Medical education. It should be noted, however, that the positive and negative effects of any law become apparent only after its implementation. Obviously, the positive consequences must be strengthened while the negative ones have to be eliminated or corrected. Otherwise, the law will be rendered ineffective. In this study, Persian and English articles were searched and extracted from Google Scholar, SID, and Magiran websites using the keywords “ Continuing education rules and regulations” . Out of the 48 articles found, 27 relevant articles were included in the study. Regardless of the benefits of Continuing education regulations, there are a number of problems and challenges in these regulations including: lack of allocation of promotional points to educational-research activities, restrictions on receiving promotional points from virtual programs, restrictions on issuing final certificates, lack of adequate training in some disciplines, and allocating equal promotional points to all lecturers. All of these need to be dealt with and corrected.

In this paper, we are presenting the basic concepts of missing data in a very simple but practical approach.Missing data are ubiquitous throughout the social, behavioral, and medical sciences. In Statistics, missing data occur when no data value is stored for the variable in the current observation. Missing data reduce the representativeness of the sample and can therefore distort inferences about the population.Missing data are a common occurrence and can have a significant effect on the conclusions that can be drawn from the data. All the methods of parameters estimation are based on the completion of data set assumption and only in this case the result will be a non- biased one, and with the increase of missing proportion, the rate of biased results increase too.For decades, researchers have relied on a variety of old techniques that attempt to “fix” the data by discarding incomplete cases or by filling in the missing values. Unfortunately, most of these techniques require a relatively strict assumption about the cause of missing data and are prone to substantial bias.

Introduction: Many of those who are eligible for Continuing medical education (CME) in order to participating in current method of education have to temporary leave their jobs. Also cost, exhaustion of the trip and lack of proper yield are some other problems. it is believed that efficiency of CME courses maybe improved by using of electronic- CME. Nowadays, in many countries new "e-courses" have become available but up to now e-learning has not been routinely used in Iran. This study by considering of eligible physicians attitude about electroric – CME has been done.Methods: in this cross – sectional descriptive study which started from September 2007 until February 2009 in Arak, 664 persons who are eligible for Continuing medical education (CME) were studied. Data were collected by a self - designed questionnaire, validity and reliability was determined respectively by content validity & Alpha kronbakh (a: -/85) results were analysed by using T-test and SPSS soft ware (version 16).Results: 644 eligible physicians participated in this study. (152 via internet and 492 verbally). Concerning the best method of Continuing medical education (CME) more than %39.6 (n=230) choose collected course and 10.7% (n=62) collected electronic CME. Inability of using computer by female is more than male but there was no significant differences among different age groups based on questionnaire.Conclusion: Most responders considered collected courses as high yield ones which refers to the fact that omission of these programs is not in accordance with the their wishes.