Background: Preterm labor, which defines as live-birth delivery before 37 weeks of gestation is a main determinant of neonatal morbidity and mortality around the world. Objective: The aim of this study was to determine the prevalence of preterm labor in Iran by a meta-analysis study, to be as a final measure for policy makers in this field. Materials and Methods:In this meta-analysis, the databases of Thomson database (Web of Knowledge), PubMed/Medline, Science Direct, Scopus, Google Scholar, Iranmedex, Scientific Information Database (SID), Magiran, and Medlib were searched for articles in English and Persian language published between 1995 and 2014. Among the studies with regard to the inclusion and exclusion criteria, 14 studies (out of 1370 publications) were selected. Data were analyzed by using Stata software version 11. The heterogeneity of reported prevalence among studies was evaluated by the Chi-square based Q test and I2 statistics. Results:The results of Chi-square based on Q test and I2 statistics revealed severe heterogeneity (Q=2505.12, p-value < 0.001 and I2= 99.5%) and consequently, the random effect model was used for the meta-analysis. Based on the random effect model, the overall estimated prevalence of preterm in Iran was 9.2% (95% CI: 7.6 -10.7). Conclusion: Present study summarized the results of previous studies and provided a comprehensive view about the preterm delivery in Iran. In order to achieve a more desirable level and its reduction in the coming years, identifying affecting factor and interventional and preventive actions seem necessary.

Background: Mobile phone dependency is an emerging public health problem. The aim of this study was to investigate the associations between general health and mobile phone dependency in college students. Methods: In this cross-sectional study, 334 students from Arak University of Medical Sciences of Iran were selected by stratified random sampling. Data were collected by (1) demographic checklist, (2) 27-item Mobile Phone Problem Usage Scale, and (3) General Health Questionnaire-28 (GHQ-28). Results: Mean scores of mobile phone dependency and GHQ-28 were 119.83 ± 43.53 and 23.73 ± 12.77, respectively. In multiple linear regression, age, family economic status, anxiety and sleep disorder, and social dysfunction were the main significant predictors of mobile phone dependency ( R = 0.469, R 2 = 0.220, adjusted R 2 = 0.203). Conclusions: Based on the finding of this study, prevention strategies for management of mobile phone use in students can be adopted.

Background Unpleasant experiences of dysmenorrhea can lead to increased anxiety. The anxiety associated with dysmenorrhea is a pain-related anxiety which might reduce the efficacy of medication as well as enhance the perception of pain. The present study evaluated the efficacy of eye movement desensitization and reprocessing (EMDR) in reducing anxiety among female university students with primary dysmenorrhea. Methods In this randomized controlled trial, 88 female university students were recruited from April 2019 to February 2020. Eligible participants were selected by convenience sampling and were allocated into study groups (44 individuals in the intervention group and comparison group) using balanced block randomization. The final sample comprised 78 participants who completed the study (39 individuals in each group). Data were collected using the Spielberger State-Trait Anxiety Inventory, Subjective Units of Distress Scale, and Validity of Cognition Scale before the intervention and at the time of the first menstrual period after completion of the intervention. The intervention group received EMDR in two individual interventional sessions which lasted approximately one hour. Data analysis was performed using analysis of variance with control of covariance method at a significance level of 0.05. Results The results of the study showed that EMDR did not have a statistically significant effect on State-Trait Anxiety of patients with dysmenorrhea (p > 0.05). Based on the Cohen’s d effect size of 0.06 for state-anxiety, -0.01 for trait-anxiety, and partial eta square less than 0.059 for both uncorrected and corrected models, the intervention was within a trivial effect. Conclusion EMDR intervention did not have a statistically and clinically significant effect on State-Trait Anxiety of patients with dysmenorrhea. Therefore, the efficacy of EMDR in treating dysmenorrhea-related anxiety remains inconclusive. Trial registration IRCT20180823040851N2 on 2019-02-09.

Introduction: Due to the chronic and progressive nature of chronic renal failure, the hemodialysis patients' need for caregivers to carry out daily care increases; as a result of this care, caregivers are also exposed to a wide range of psychological and physical problems. One of the psychological symptoms experienced by caregivers is death anxiety. This study was conducted to determine the predictors of death anxiety in caregivers of hemodialysis patients. Methods:In this cross-sectional descriptive study (May to Jun 2018), 176 caregivers of hemodialysis patients were selected using convenience sampling method from hemodialysis centers of Qazvin. A demographic characteristics questionnaire and Templer Death Anxiety Scale (TDAS) were used to collect data. Data analysis was performed using descriptive and inferential statistics including multiple linear regression in SPSS 23. Results:The mean score of caregivers' death anxiety was 48.37±9.18. Multiple regression results showed that gender (b=4.163, P<0/05), caregiver's relation with patient and simultaneous responsibility for caring other patients were significant predictors of death anxiety. The coefficient of determination indicated that the independent variables of the regression model explain 20.7% of the changes in death anxiety. Conclusion:Considering the important role of caregivers of hemodialysis patients, paying attention to psychological complications of this population such as death anxiety and its effective factors are important. Based on these variables, support and educational programs can be conducted to control the death anxiety in caregivers.

Objectives This study aimed to assess the relationship of skeletal class of malocclusion with some radiomorphometric indices of the mandible in short-face patients. Materials and Methods This cross-sectional study was conducted on 179 short-face patients between 17 to 30 years who sought orthodontic treatment during 2013 to 2020. The gonial and antegonial angles, and type and depth of antegonial notch were assessed bilaterally on traced panoramic radiographs. The correlation between radiomorphometric indices and class of malocclusion was analyzed by SPSS version 25 (alpha = 0.05). Results The mean size of gonial angle was significantly different among the three classes of malocclusion (P < 0.001), and the largest gonial angle was recorded in class III, and the smallest in class I patients. The mean size of antegonial angle and antegonial depth were not significantly different among the three classes of malocclusion (P > 0.05). The difference in the mean size of gonial and antegonial angles was not significant between males and females (P > 0.05). However, the mean antegonial depth in males was significantly greater than that in females (P < 0.001). Type I antegonial notch was more common in females than males at both sides. Age had no significant correlation with gonial angle, antegonial angle, or antegonial notch depth (P > 0.05). Conclusion Facial growth pattern in short-face patients can be predicted with antegonial angle.Also there is significant correlation of skeletal class of malocclusion with size of gonial angle. Clinical Relevance: The present results emphasized on the role of antegonial angle in prediction of facial growth pattern in short-face patients, and revealed significant correlation of skeletal class of malocclusion with size of gonial angle.