Background: With the increasing number of elderly people in the world, usage of concepts and terminology related to this phenomenon has substantially increased. One concept in this context is successful aging. The purpose of the present study is to extract and introduce a common concept to be used in studies on measuring successful aging. Methods: This is a review study. First, by searching the databases of Magiran, Noormags, Medlib, Irandoc, Iranmedex, Barakat Knowledge Network System, Civilica, SID, ISI Web Of Science, PubMed, Scopus, Science Direct and search engines, Google Scholar and Elmnet as well as using standard keywords such as elder, elderly, aging, and successful aging, all related published articles during the period 1995 to 2017 were retrieved. A total of 3417 documents were retrieved. By removing 3390 unrelated, duplicate and unusable documents, 27 articles were included in the study after quality control. Results: The findings of the study were categorized in three areas: "defining successful aging by focusing on dimensions", "successful aging principles" and "factors influencing successful aging". Reviewing various studies, we found that the definition of successful aging deals with cognitive action, perception, control, life satisfaction, and ethics. Successful aging is also defined as having inner feelings of happiness and satisfaction with life for the present and the past. Sometimes successful aging is also considered to be survival with health. Conclusion: Health care professionals as community health supporters can use the results from the present study for providing the grounds for successful aging. Then, they can use the designed successful aging program for preserving and promoting active and healthy aging for every elderly person in old age.

Background and Aim: Although air pollution is a serious problem in Ahvaz, the association between air pollution and respiratory diseases has not been studied enough in this area. The aim of this study was to determine the relation between short-term exposure to air pollutants and the risk of hospital admissions due to asthma, COPD, and bronchiectasis in Ahvaz. Methods: Hospital admissions data and air pollutants including O₃, NO, NO₂, SO₂, CO, PM_10, and PM_2.5 were obtained from 2008 to 2018. Adjusted Quasi-Poisson regression with a distributed lag model, controlled for trend, seasonality, weather, weekdays, and holidays was used for data analysis. Results: The results showed a significant increase in hospital admissions for asthma (RR=1.004, 95% CI: 1.002– 1.007) and COPD (RR=1.003, 95% CI: 1.001– 1.005) associated with PM_2.5. PM₁₀ was associated with increased hospital admissions due to bronchiectasis in both genders (Men: RR=1.003, 95% CI: 1.001– 1.006) (Female: RR=1.003, 95% CI: 1.000– 1.006). NO₂ was also associated with an increased risk of hospital admissions for asthma (RR=1.040, 95% CI: 1.008– 1.074) and COPD (RR=1.049, 95% CI: 1.010– 1.090). SO₂ was associated with the risk of hospital admissions of asthma (RR=1.069, 95% CI: 1.017– 1.124) and bronchiectasis (RR=1.030, 95% CI: 1.005– 1.056). Finally, CO was associated with COPD (RR=1.643, 95% CI: 1.233– 2.191) and bronchiectasis (RR=1.542, 95% CI: 1.035– 2.298) hospital admissions. Conclusion: Short-term exposure to air pollutants significantly increases the risk of hospital admissions for asthma, COPD, and bronchiectasis in the adult and elderly population.

Background: Air pollution and weather are just two of many environmental factors contributing to traffic accidents (RTA). Objectives: This study assessed the effects of these factors on traffic accidents and related mortalities in Ahvaz, Iran. Methods: In this ecological study, data about RTA, traffic-related mortalities, air pollution (including NO, CO, NO₂, NO_x PM₁₀, SO₂, and O₃ rates) and climate data from March 2008 until March 2015 was acquired from the Khuzestan State Police Force, the Environmental Protection Agency and the State Meteorological Department. Statistical analysis was performed with STATA 12 through both crude and adjusted negative binomial regression methods. Results: There was a significant positive correlation between increase in the monthly average temperature, the number of rainy days, and the number of frost days with the number of RTA (P < 0.05). Increased monthly average relative humidity, evaporation, and number of sunny days were negatively correlated with the frequency of RTA (P < 0.05). We also observed an inverse significant correlation between monthly average relative humidity, evaporation, and wind speed with traffic accident mortality (P < 0.05). Some air pollutants were negatively associated with the incidence rate of RTA. Conclusions: It appears that some weather variables were significantly associated with increased RTA. However, increased levels of air pollutants were not associated with increased rates of RTA and/or related mortalities. Additional studies are recommended to explore this topic in more detail. Keywords: Air Pollution; Weather; Traffic Accidents; Mortality

Background: Multiple Sclerosis (MS) is a demyelinating disease of the nervous system which has numerous disabling effects on patients. Objectives: This study aimed at investigating the short- and long-term effects of a period of combination exercise therapy on walking distance, balance, fatigue and quality of life in multiple sclerosis patients referred to the physiotherapy clinic of Iran's Multiple Sclerosis Society in 2013. Patients and Methods: This study was a randomized controlled clinical trial on 59 patients divided into the intervention (n = 39) and control groups (n = 20). The intervention group received 10 weeks of combination therapy including aerobic, strengthening, balancing and stretching exercises. A week before, a week later and a year after the beginning of the exercises, both groups of patients received BBSS, six minute walking, Family Support Services (FSS), Expanded Disability Status Scale (EDSS) and quality of life tests. The scores of two groups were then compared using statistical tests such as repeated measures ANOVA test. Results: The results indicated significant changes in the intervention group in comparison to the control group in the second phase of the study comparing to the first one for all tests except EDSS (Mean difference scores of EDSS: -0.13), P-value = 0.60; FSS: -6.9, P-value = 0.02, Mental Quality of Life (QOL): 16.36, P-value = 0.001; Physical QOL: 12.17, P-value = 0.001, six minute walking: 137.2, P-value < 0.0001; and Berg: 3.34, P-value < 0.0001. These changes were not significant in the second phase of the study comparing to the third one; however, they were again significant in the third phase comparing to the first phase of the study (P < 0.05). Conclusions: Exercise has significant effect on improving symptoms of multiple sclerosis, and cessation of exercise may cause recurrence of symptoms in the intervention group with a slope similar to that of the control group. Therefore, continuous rather than short period exercises have valuable symptomatic and supportive relief effects in patients. Keywords: Fatigue; Quality of Life; Multiple Sclerosis; Exercise Therapy