نشریه پژوهش سلامت
سال ششم شماره 3 (پیاپی 23، بهار 1400)

Organisms, including humans, have an internal biological clock that helps them adjust to a regular circadian rhythm. The aim of this study was to investigate the existence of genetic changes in biological clocks in the search for information of different people and to draw a pattern for searching health information.

The present study was a fundamental applied type that performed by quasi-experimental method. The statistical population of the study consisted of 69 students who were selected by purposive sampling. Data were collected in two stages of completing the general health questionnaire, morning and evening sleep type and observing the behavior of completing search tasks and log analysis using images recorded from users in Camtasia studio software. Then, data analysis performed using log file analysis, chi-square and ANOVA tests.

The analysis of the subjectschr('39') search and retrieval behavior showed that these individuals have performed a total of 1574 strategies and techniques in the search process. The results showed that the highest frequency is related to the intermediate sleep group (65%). Also, 11.5% of users slept in the evening and 23% slept in the morning. People with nighttime sleep had better information search time in less time than others (P = 0.017).

None of the sleep types can affect the tests and cause cycles. Based on the genetic changes that occur, humans have different characteristics that create individual and functional differences, and therefore the range of individual differences is very wide.

Hospitals and medical centers are important in terms of quantity and quality of the services they provide. Therefore, inventory control is a process that ensures that the required inventory are available to the operational departments by considering the factors of time, place, quantity, quality and cost. The aim of this study was to reduce the cost of hospital with a control approach to planning available hospital inventories.

In this study, an improved optimized model with objective function was used, which includes inventory cost, costs and orders. Therefore, the inventory of ten most important items of operating room requirements was considered. To solve the model, the variable neighborhood search method was used with the approach of reducing hospital costs in MATLAB software.

10 types of most expensive goods used in the operating room were examined. Finally, according to the average demand of the studied goods in the year, a certain amount of inventory and the number of orders for each of them was obtained.

The variable neighborhood search algorithm answered in less than 5 minutes and by examining the quality of the answer, it shows that this method has an acceptable performance in solving this problem. Finally, the hospital did not face a shortage of goods during this period, despite heavy sanctions. Therefore, this method can be used to solve the problem of inventory control in the operating room of the hospital.

Although pregnancy is a physiological and natural phenomenon, women are exposed to physical and psychological changes during pregnancy that can affect their health and that of the fetus. Therefore, this study was performed to investigate the relationship between depression, anxiety and maternal stress with pregnancy outcome in pregnant women in 28-24 weeks of pregnancy

This prospective longitudinal study was performed on 241 pregnant women in 24-28 weeks of gestation in 2018-19. Mothers in the exposure group scored 1 deviation above the mean in the Labivand Anxiety, Stress and Depression Questionnaire. Outcomes of the study included evaluation of preterm delivery (before 37 weeks) and neonatal outcome. Mothers were followed up until delivery and delivery. Data were analyzed using t-test, chi-square and logistic regression. Significance level less than 0.05 was considered significant.

The results of the study showed that, preterm delivery, birth weight, neonatal height and head circumference, respiratory distress and neonatal jaundice were significantly associated with maternal stress and anxiety during pregnancy.

Considering the relationship between depression, anxiety and maternal stress with pregnancy outcomes, the assessment and control of psychological factors such as stress and maternal concerns in prenatal care as well as other biological and medical factors in the direction of preterm delivery can be included.

This study aimed to investigate the relationship between cognitive emotion regulation strategies and health anxiety with regarding the mediating role of alexithymia in medical students.

This study was a correlational research in the form of structural equation research. Using convenience sampling, 450 medical students were selected and asked to complete the Salcovix and Warwick Health Anxiety Questionnaires (1986), Toronto Emotional Inventory Questionnaire (Bagby, Parker & Taylor,) and Emotional Adjustment Questionnaire (Garnefsky & Kreige & Spinhaun,). The data were analyzed using Amos software and statistical equation method.

The results showed that the two tested models have significant relationship between positive and negative emotion regulation strategies and health anxiety with mediating role of alexithymia (P<0.01). In the study of Pearson correlation coefficients between variables, except for the correlation coefficients between emotion regulation strategy with health anxiety attitude and disaster emotion regulation strategies, rumination with emotional distress, other coefficients were significant (P<0.01).

Based on the above results, it can be concluded that emotion regulation strategies have a significant role in medical studentschr('39') anxiety level and alexithymia can modulate this relationship.

The 2019 outbreak of coronavirus (covid-19) infections, which began in China in late 2019, is growing rapidly and the disease has spread worldwide. Studies have shown that the elderly have a higher risk of Covid-19 infection and death than others in the community. The aim of the present study was to investigate the effect of exercise on the response to Covid-19-like vaccines in the elderly. Aging is associated with a decline in the normal function of the immune system. Among prevention methods, vaccination is the main drug strategy to reduce the incidence and severity of viral diseases. It is noteworthy that the most vulnerable populations in the community who experience the most severe cases of Covid-19 disease are those who show a decrease in the effectiveness of the vaccine. Reasons for reduced flu vaccine reactions in the elderly may be due to immune aging and chronic disease. The data show that humoral and cellular immune responses after vaccination are low in the elderly. Decreased efficacy of the vaccine may be related to decreased antibody response. The response of cytotoxic T lymphocytes to viral infections and vaccination in the elderly is also impaired. Chronic exercise is also associated with several anti-influenza benefits, including reducing the risk of influenza and increasing the effectiveness of the vaccine. In active elderly, anti-influenza IgG and IgM and influenza-specific lymphocyte proliferation are higher than in sedentary individuals. Therefore, it is recommended that the elderly do training exercise to increase the effectiveness of the vaccines.

Military spending, education and health are among the most important components of the government budget, and achieving a balance between them is a bit complicated. Increasing military spending can increase or decrease health spending and health status. Therefore, the purpose of this study was to investigate the effect of military spending on health status in Middle Eastern countries.

The present descriptive-analytical and applied study was performed for Middle Eastern countries (including Iran) using the Paneldita method with cross-sectional dependence. Among Middle Eastern countries, 13 countries were selected as the statistical population by systematic sampling method. The data required for the study was an annual time series that was extracted from the World Bank databases for selected countries in 1990-2019. Boys CD, Boys Unit Root (CIPS test), Westerlund aggregation and model estimation with common mean group correlation effect estimators (CCEMG), generalized group mean (AMG), fully modified ordinary squares (FMOLS) and dynamic ordinary squares (DOLS) ) In Eviews 10 and STATA 16 software.

The co-integration results of the models showed that Military expenditures as a percentage of GDP has a negative effect on life expectancy of -0.037 and -0.004 in AMG and CCEMG estimators, respectively, and a positive effect of 0.22 and 1.91 on the mortality rate of children under five years of age in FMOLS and DOLS estimators, respectively. The logarithm of GDP per capita had a positive effect on life expectancy of 0.553 and 0.588 in the AMG and CCEMG estimators, respectively. The annual growth rate of the urban population also had a positive effect of 0.048 on life expectancy with the AMG estimator.

military expenditures as a percentage of GDP had a negative effect on life expectancy and a positive effect on the under-five mortality rate in the Middle East. GDP and urbanization rates also had a positive effect on life expectancy and a negative impact on the under-five mortality rate; Therefore, it is suggested to maintain a certain and appropriate ratio of military expenditures to other social expenditures. Also, some solutions to achieve greater security by reducing military expenditures are proposed.

Comprehensive identification of the factors explaining the prevalence of Covid-19 is essential. The purpose of this study was is to evaluate the socio-economic variables affecting the prevalence of Covid-19 within countries around the world.

This research has been conducted in three steps. In the first step, by analyzing the theoretical literature, 43 primary variables affecting the pandemic were identified. In the second step, using exploratory factor analysis method, the identified variables were aggregated into the components of individual-social health indicators, macroeconomics, political economy indicators, government economic status, human-social capital, access to information technology and population structure. In the third step, using stepwise regression method, the main factors explaining the prevalence of covid-19 for 94 selected countries were evaluated.

In the socio-economic field, variables including inflation, corruption index, GDP per capita, government spending status, human rights index and economic freedom are effective, respectively. On the other hand, the evaluation of the effect of identified factors on Covid-19 using stepwise regression method confirms that the variables of government spending, unhealthy climate, and social-human capital have explanatory roles, respectively. Finally, the number of deaths per infection depends on two variables as overweight and heart problems.

The effect of individual-social health components on the prevalence of Covid-19 emphasizes that governments have an important role in managing health facilities. On the other hand, given that inflation, GDP per capita and government spending have the highest rate of explanation in the prevalence of the Covid-19, the need for economic policy in controlling the corona is highlighted.

The aim of this study was to evaluate the effect of six weeks of TRX training and curcumin consumption on muscle injury indices in female athletes.

This quasi-experimental study was performed on 36 healthy female athletes with an age range of 18-25 years and a body mass of 18.5.5 kg / m2. Subjects were purposefully selected and randomly divided into three groups of 12 people including exercise + placebo, exercise + curcumin and curcumin. The training protocol consisted of six weeks of TRX training (three sessions per week; eight sessions per session). Curcumin supplementation is also given in the form of 500 mg capsules daily after lunch. Data were analyzed by paired t-test and one-way ANOVA at a significance level of 0.05 with Spss-22 software.

Posttest values ​​related to creatinine index were significantly reduced in the exercise + placebo (P = 0.02) and exercise + curcumin (P = 0.03) groups. Also, this decrease in lactate dehydrogenase index was observed in the mentioned groups (P = 0.04 and P = 0.04, respectively). There was a significant difference between exercise + placebo group and curcumin group in creatine kinase (P = 0.00), lactate dehydrogenase (P = 0.02) indices. Also, a significant difference was observed between the exercise + curcumin group and the curcumin group in the indices of creatine kinase (P = 0.00) and lactate dehydrogenase (P = 0.05).

To reduce muscle injuries, TRX training can be used as an effective method to reduce pain and bruising after exercise. In addition to this exercise method, taking curcumin herbal supplement is effective in faster recovery of pain and contusion after exercise.