Showing 37 results for Model
Tahereh Razi, Mohsen Shamsi, Mahbobeh Khorsandi, Nasrin Roozbehani, Mehdi Ranjbaran,
Volume 18, Issue 7 (10-2015)
Abstract
Background: M others must gain enough knowledge and practice about danger signs in children to achieve behavior change. Knowing such factors influencing behavior change will facilitate change. So, training about danger signs in children using models that identify the factors influencing behavior is essential. Health belief model is one of the effective models in education. Therefore, the aim of this study was to assess the effect of education on behavior of mothers about danger signs in children less than five years.
Materials and Methods: This is an educational trial study that was conducted on 116 mother with children under five years old referring to treatment health centers in Arak city in 2014. They were divided into two groups case (n=56 ) and control ( n=60 ) randomly.
The data collected by filling the valid and reliable questionnaire that reseatcher made along with interview. An educational intervention was conducted in case group during the four learning sessions. Three months after educational intervention, post-test was conducted by filling questionnaire. Finally, data were analyzed by SPSS software in significance level of p<0/05.
Results: There was no significant difference between mean score of health belief model construct and behavior in the experimental and control groups before the intervention(p<0.05) , but significant differences were shown after intervention(p<0.001). The mean score of the mothers in the intervention group before and after intervention was 39.58±42.15, and 84.52±23.05 respectively, that showed significant differences (p<0.001).
Conclusion: According to the results of this study, educational intervention based on initial assessment on Health Belief Model was effective in improving mothers' practice about danger signs in children. Thus, it can be helpful to design training programs.
Somaye Pormosayebi, Mohsen Shamsi, Mahbobeh Khorsandi, Ali Kolivand, Mehdi Ranjbaran,
Volume 18, Issue 8 (11-2015)
Abstract
Background: Today, environmental pollutants are one of the most important human problems. The purpose of this study was to assess the health belief model structures for promotion of preventive behaviors in pregnant women exposed to air pollution in Arak city in 2014.
Materials and Methods: In this cross-sectional study, 208 pregnant women referred to healthcare centers in Arak city were selected by multistage sampling and were studied. Data were collected by using a valid and reliable self- report questionnaire. The questionnaire included the demographic characteristics of the mother, the aspects of the HBM model, and the maternal practice checklist. Finally, the data were analyzed.
Results: The mean age of subjects was 26.48 ±4.77 and the mean gestational age was 14.88 ±5.59 weeks. The highest level of education for pregnant women (47.1%) was a diploma. The mean practice score was 72.9 and among the structures, the highest and the lowest score was obtained for perceived susceptibility(83.25) and barriers(59.16), respectively. To predict the hehavior by using the HBM structures, regression analysis showed that of the studied variables, the external practice guides, perceived susceptibililty, and barriers are as behavior predictive predictive agents that totally, predicted 26% (R2=0.265) of behavior changes.
Conclusion: According to the results of the study, the design of educational interventions should be based on the external practice guides, perceived susceptibility and barriers structures as the most important predictors of maternal behavior.
Masoomeh Ashoorirad, Rasool Baghbani Khezerloo,
Volume 18, Issue 9 (12-2015)
Abstract
Background: Electrocardiogram signal (ECG) is a graphical representation of the heart activity. Processing and analysis of these morphological changes can result in visual diagnosing some cardiac diseases. However, various types of noises and disturbances in ECG influence the visual recognition and feature extraction from it. The aim of this research is to eliminate different noises from ECG and to enhance its quality.
Materials and Methods: In this study, an adaptive Kalman filter is developed by using Bayesian model. Considering simplification and Gaussian distribution for measurement noise, complicated mathematical equations were converted to simple relations and therefore implementation was simplified.
Results: In this paper, by designing an adaptive Kalman filter, the signal to noise ratio (SNR) has increased to 21.46dB. Adaptive Kalman filter based on Beyesian framework could model dynamic variations of ECG signal by estimating covariance matrix for measurement noise.
Conclusion: In despite of Kalman filters that use parametric functions to model ECG signal, the adaptive Kalman filter introduced in this paper uses real ECG records for modeling. Parametric functions which could model dynamic variations of ECG need a lot of analytical functions and this decreases the time of filtering process but the adaptive Kalman filter proposed in this research has a high speed and could be used in real time applications.
Farzad Ebrahimzadeh, Ebrahim Hajizadeh, Abdolkarim Shadmehr, Nasim Vahabi, Ezatollah Fazeli Moghadam, Javad Nasseryan, Mehdi Safari,
Volume 18, Issue 10 (1-2016)
Abstract
Background: Height and weight growth failure are among the most important health disorders affecting children less than two in the developing countries. Failure to treat this disorder can lead to the development of serious conditions including increased mortality and types of disability. The aim of the present study is to investigate the factors affecting the height and weight growth of children less than two years old.
Materials and Methods: This historical cohort study was conducted on a sample of 2030 children less than two in Khorramabad who were selected using stratified and cluster sampling methods. Based on household records, data related to the height and weight were recorded as quantitative variables and finally were modeled using a longitudinal marginal model, identity link functions and the R software.
Results: Based on the marginal model, the effect of such variables as child's age, child's gender and mother's educational attainment were significantly related to the child's height and weight. Moreover the child's birth order had significant relationship with only the child's height. However, the variable of exclusive breastfeeding during the first six months was no significantly related to weight and height growth of the children.
Conclusion: Given the results, it seems that monitoring the growth of the children of the illiterate mothers, specially the girls and the children with first birth orders are the most important approaches to deal with growth disorders among this population.
Seydeh Mahtab Navabi, Mahboobeh Khorsandi, Nasrin Roozbahani, Mehdi Ranjbaran,
Volume 18, Issue 10 (1-2016)
Abstract
Background: One of the common and important public health problems is failure to thrive in during childhood .The purpose of this study was to investigate the relationship between health belief model structures with mothers' performance in preventihg growth retardation in children aged 1-5 years in Shazand city in 2014.
Materials and Methods: In this analytical and cross-sectional study, 202 mothers with children aged one to five years in the Shazand city were selected by random sampling. The data were collected by using a researcher-developed valid and reliable questionnaire by self-report method. The questionnaire included demographic characteristics of the mothers, the maternal practice cheklist and health belief model dimensions. Finally, the data were analyzed by SPSS20 T-test, Chi-square, correlation, ANONV and regression.
Results: The mean age of subjects was 28.76±5.28 years and a mean age of children was 26.49±14.74 months. Most common level of education for mothers was diploma (76.7%). The mean score of mothers' behavior was 70.65. Among the structures, self- efficacy had the largest score(69.8) and external practice guide had the lowest (38.91). In regression analysis, for predicting behavior by health belief model stuctures, self efficacy, perceived benefits and barriers were main predictors of behavior that predicted 10% of behavior changes(R2=0.101).
Conclusion: The results of this study reveale that the design of educational interventions should be based on self-efficacy, perceived benefits and perceived barriers as the most important predictors of maternal behavior.
Azita Mohsennejad, Mahboobeh Khorsandi, Nasrin Roozbahani, Babak Eshrati,
Volume 19, Issue 1 (4-2016)
Abstract
Background: Improvement of nutrition like fish and sea products is influential in preventing from non-contagious diseases. The transtheoretical model is one of the models for effective investigation on nutrition behaviors. This study was done with the aim of investigating fish consumption among women 30 to 50 years old based on the transtheoretical model.
Materials and Methods: This study was an analytical and cross sectional analysis which was conducted in 2014 on 360 women 30 to 50 years in Arak city. The data have been collected by using researcher-made questionnaires which its validity and reliability was assessed in accordance to the transtheoretical model were obtained by visiting houses. Then the collected data were analyzed by pearson correlation test.
Results: The average age of the respondents was 39.34±7.5. The average of fish consumption was 0.62 ±0.83 times a week. 64 % of people in consumption of at least two servings of fish a week were in the two first stages of change (pre-contemplation and contemplation).The average score of self-efficacy in fish consumption was a total of 10.58 ±3.12 out of 15 and the average score of cons of fish was 26.35 ±4.78 and the average score of pros of fish was 21.6 ±2.67 out of 25. Pearson correlation indicates that the amount of fish consumption with constructs of the self-efficacy, stages of change and pros of fish had respectively the most positive correlation (p≤0.05). Fish consumption had no significant difference with age, education, Body Mass Index, occupation, monthly income and marital status.
Conclusion: Fish consumption despite its high level of perceived benefits is really low and to eliminate these barriers, education and cultural-building especially in women who are influential people in family nutrition is necessary.
Fahimeh Farahani Dastjani, Mohsen Shamsi, Mahboobeh Khorsandi, Mohammadreza Rezvanfar, Mehdi Ranjbaran,
Volume 19, Issue 2 (5-2016)
Abstract
Background: Diabetes is one of the most common disease resulted from metabolism disorders. Thus, Studying medication adherence in patients to explain educational interventions to improve the health of these patients is necessary. Therefore, the present study aimed to assess the factors affecting medication adherence in diabetics patients based on health belief model in Arak 2014.
Materials and Methods: In this analytical study, 366 diabetic patients in Arak in 2014 were selected and data were collected through a researcher made questionnaire about patients behavior in the field of medication adherence and its influencing factors based on the health belief model. Linear regression model was used to determine the predictive power of structures.
Results: The mean knowledge score and the medication adherence was 31.34 and 84.34, respectively. In this study, perceived susceptibility, perceived barriers and internal action guide were as the strongest predictors of medication adherence behavior in patients and predicted their behavior variance 0.36. Between function and susceptibility and severity and perceived benefits and self- efficacy of manual internal and external action guides in the field of medication adherence with diabetes, there was a direct correlation that the highest correlation was related to the perceived susceptibility structure (r=0.42 , p<0.001).
Conclusion: The results showed that the educational interventions with an emphasis on building the perceived sensitivity of patients with diabetes for medication adherence and emphasis on internal incentives as motivators and incentives for patients to achieve better results in the field of medication adherence should be at the heart of educational interventions.
Alireza Zarinara, Mohammad Mahdi Akhondi, Hojjat Zeraati, Koorosh Kamali, Kazem Mohammad,
Volume 19, Issue 6 (9-2016)
Abstract
Background: The prediction models for infertility treatment success have presented since 25 years ago. There are scientific principles for designing and applying the prediction models that is also used to predict the success rate of infertility treatment. The purpose of this study is to provide basic principles for designing the model to predic infertility treatment success.
Materials and Methods: In this paper, the principles for developing predictive models are explained and then the design of such models in infertility treatments is described in more details by explaining one sample.
Results: The important principles for models that firstly are described are: identifying and defining the purpose, expected function of model, input data that will be used to develop a model: type of intervention or diagnostic procedures that can lead to changes in the samples and output definition or expected result of model function. Further, characteristics of predictive factors in final model, drawing the information flowchart, internal and external validation and attention to the analysis programme of results are the important subjects that have been described.
Conclusion: If predictive models are used properly, can help treatment team and patients to achive best treatment in ART.
Zahra Abdolalian, Mohammad Rafeie, Ahmad Reza Baghestani, Mohamad Amin Pourhosseingholi, Tahoura Daneshvar,
Volume 19, Issue 9 (12-2016)
Abstract
Abstract
Background: 4cure models are a model to analyze survival data that these models exist for long term survivors. Cure models are a special type of survival model where it is assumed that there are a proportion of subjects who had never event, thus, survival curve will eventually reach a plateau. Therefore, standard survival models are not appropriate because they do not account for the possibility of cure.The aim of the present research is to apply non-mixture cure model to analyze survival of patients with colorectal cancer.
Materials and Methods: We studied 232 patients with colorectal cancer who were visited and treated at Taleghani Hospital Research Center for Gastroenterology and Liver Disease in Tehran. These patients were diagnosed from 1987 to 2012 and followed up until 2013. The Effect of age, gender, family history, body mass index and site of infection were studied. Kaplan-Meier and Non-Mixture cure Model were used for analzing data.
Results: The ten-year survival rate after diagnosis in the studied patients was 64 % .A total of 60 (25.8 %) deaths due to colorectal cancer were observed. The mean of age at the time of diagnosis was 51.6 years. Based on non-mixed cure model, the rangs of age was 45-65 years old and BMI were significant.
Conclusion: When the population is divided into two groups (susceptible and non- susceptible individuals), using Cox semi-parametric model is not appropriate. Therefore, we should use cure models.
Mojgan Ahmari Nejad, Rahmatollah Jadidi,
Volume 19, Issue 12 (3-2017)
Abstract
Abstract
Background: Today, the role of word of mouth (WOM) in making decision particularly in service sector became important. Thus, this study aimed to investigate the effect of word of mouth on pregnant woman decision-making behavior to join the Royan Cord Blood Bank.
Materials and Methods: The research is operational and has a causal nature. The population of study was 790 pregnant women enrolled in Royan Cord Blood Bank in Arak city that 294 subjects were selected by available non-random sampling method. To collect data, questionnaire instrument was used. Data were analyzed according to Structural Equations Modeling (SEM) by LISREL (version 8.54) software.
Results: The results of the study revealed that the effect of communication medium on personal information source and word of mouth was significant and positive. In addition, opinion leaders had a significant and positive influence on personal information source and word of mouth and also, the significant and negative effect of opinion leaders on perceived risk was seen. Personal information source had a significant and positive effect on decision-making. However, social structure didn't have any effect on word of mouth. Likewise, word of mouth didn't influence decision-making.
Conclusion: According to the findings of the research, it seems that paying attention to the prerequisites and conditions making a suitable bed for creating effective word of mouth and expanding it to making decision for joining the Royan Cord Blood Bank is very necessary.
Mahtab Navabi, Mahboobeh Khorsandi, Nasrin Rouzbahani, Mehdi Ranjbaran,
Volume 20, Issue 1 (4-2017)
Abstract
Abstract
Background: One of the common and important health problems is failure to thrive in childhood. The purpose of this study was to determine the effect of education on preventive behaviors of failure to thrive in mothers with children based on health belief model.
Materials and Methods: This study is an interventional one in which 100 mothers with children one to five years involved (samples divided into two case and control groups, each of 50) sampling was done by a simple random method. For collecting information, a researcher-made questionnaire based on the health belief model and performance check list were used. Then, case group was trained for one month. 3 months after training, data were gathered and analyzed by Spss20 software. In addition to descriptive statistics, tests such as Chi-square, paired t-test and independent T-test were used.
Results: The mean age of case and control was 29.98±5.51 and 25.35±5.30 years old, respectively. The average age of children was 23.31 ± 13.14 and 27.55 ± 14.01months, respectively. Before the intervention, no significant difference was seen between groups. The average score in case group before intervention was as: knowledge(31.87±14.24), perceived susceptibility(64.23±5.86), perceived severity(64.41±9.34), perceived benefits(61.75±6.79), perceived barriers(67.91±8.14), self-efficacy(68.00±7.87), cues to action(44.53±6.82) and action(70.00±9.77). However, after the intervention, significant differences between groups in all variables were obserred.
Conclusion: According to the results, education based on health belief model is recommended for promoting preventive behaviors of failure to thrive.
Zahra Rahimi, Ahmad Rahbar, Fatemeh Kheyrollahi, Ali Ebraze, Zabihollah Gharlipour,
Volume 20, Issue 7 (10-2017)
Abstract
Abstract
Background: The evaluation of the amount and type of edible oils can significantly help to raise the people’s awareness about how to use this type of food product. The aim of this study was to determine consumption pattern of various edible oils and its related factors based on PRECEDE model.
Materials and Methods: This cross sectional descriptive analytic study was performed on 300 urban and rural women referring to health centers in Qom province. The participants were selected via multi-stage sampling method. The data were collected using standard questionnaire of PRECEDE model and analyzed by SPSS V.20 using independent t-test, paired t-test, ANOVA, and Pearson correlation coefficient.
Results: The results of this study showed that 46.4% of urban women and 53.6% of rural women used solid oil. There was a significant difference between urban and rural households in terms of the consumption of tallow oil (p<0.05), as the consumption of tallow oil was more prevalent in rural households than in urban households. Also, there was a statistically significant difference between the two groups of urban and rural women in terms of the mean score of consumption of healthy edible oils and reinforcing factors (p<0.05), as the mean scores of urban women were better than those of rural women.
Conclusion: Implementation of training programs using training models such as the PRECEDE model can help to modify and correct the pattern of consumption of edible oils, especially in rural areas and promote the level of health of the community.
Fatemeh Amiri, Rasoul Najafi,
Volume 23, Issue 3 (8-2020)
Abstract
Background and Aim: Fertility pattern is one of the most important determinants of population fluctuations. Various individual and social factors affect this pattern. This study aimed to determine the factors affecting the fertility pattern using the structural equation model.
Methods & Materials: In this cross-sectional study, 384 women were randomly selected from married women of childbearing age who referred to Taleghani, Valiasr, and Amir Al-Momenin hospitals in Arak as patients. After obtaining verbal consent to participate in the study, a researcher-made and valid questionnaire was completed for them. Structural equation modeling was used to measure the effect of important individual and social variables on fertility patterns. Data analysis and analysis were performed with AMOUS software version 11 and SPSS V. 22.
Ethical Considerations: This study was registered with the ethics code IR.ARAKMU.REC.1396.4 by the Research Ethics Committee of Arak University of Medical Sciences.
Results: The Mean±SD age of the participants in the study was 40.03±11.19. The variables affecting the fertility pattern using the structural equation model included, respectively, the type of individual exercise, the method of contraception, the type of infertility treatment, and the duration of use of the contraceptive method.
Conclusion: The results showed that physical activity, contraceptive method, and duration of use of this method and the type of infertility treatment were related to fertility pattern. By recognizing the factors affecting the fertility pattern and increasing the awareness of young couples, it is possible to help improve the fertility pattern.
Fatemeh Amiri, Ghodrat Roshanaei, Meysam Olfati Far, Rasoul Najafi, Jalal Poorolajal,
Volume 24, Issue 2 (5-2021)
Abstract
Background and Aim: Acquired Immunodeficiency Syndrome (AIDS) caused by Human Immunodeficiency Virus (HIV), is a chronic and potentially life-threatening disease. Numerous factors affect its development and progression. Therefore, the present study attempted to identify characteristics impacting the prognosis and progression of AIDS using multistate models.
Methods & Materials: The present retrospective study consisted of 2185 patients affected with HIV referring to Behavioral Disease Counseling Centers in Tehran City, Iran, from 2004 to 2013. We considered multiple states of AIDS, tuberculosis, and tuberculosis/AIDS in the natural history of the disease (from the onset of HIV disease until death occurred). Then, we applied the multistate models, to examine the effect of contextual demographic and clinical variables on survival time; subsequently, the transition probabilities of HIV.
Ethical Considerations: This study was approved by the Research Ethics Committee of Hamadan University of Medical Sciences (Code: IR.UMSHA.REC.1396.117).
Results: HIV-Related deaths in individuals with an incarnation history were 2.40 times higher than in those without the prison history. Death risk was also 1.70 and 1.80 times higher in those aged 25-44 and 44 years, respectively, compared to the individuals aged less than 25 years. An inverse relationship was also found between CD4 levels and the risk of death in our participants.
Conclusion: Antiretroviral therapy, CD4 count, age, and history of imprisonment were the main factors in the progression of the disease and subsequent death in HIV patients. Thus, preventing the further spread of the disease to the community and controlling the disease in the patients requires targeted educational and therapeutic interventions; accordingly, the community will be familiarized with transmission routes and the preventing principle of disease. Furthermore, we can encourage patients to visit the healthcare centers early.
Mahboobeh Darzi Poor, Reza Tavakoli, Davood Shojae Zade, Zahra Rezagholizadeh Omran,
Volume 25, Issue 1 (3-2022)
Abstract
Background and Aim Nosocomial infection is a health problem in all countries. Considering the role of midwives in controlling nosocomial infection, the aim of this study was to determine the effect of an educational intervention based on model on preventive behaviors of nosocomial infection by Babol hospitals midwives was done.
Methods & Materials The present study was a quasi-experimental study with intervention and control group. The interventions were performed in three 40-minute sessions in the Shahid Yahya Nejad Hospital in April and May 2017. The data collection tool was a structure Health Belief Model based(Awareness, structure Health Belief Model and behavior) on a questionnaire completed Its validity and reliability were assessed two months before and one month after Midwives who met the inclusion criteria education. Data were collected and analyzed by SPSS software v. 24 by Anova , T-test and ANCO one-way Covariance tests.
Ethical Considerations This research paper has been approved by the ethics committee IR.IAU.TMU.REC.1398.068 and informed consent will be taken from the participants in the study the information will remain confidential.
Results Before the intervention, the two groups did not differ significantly in terms of, mean scores of different model structures. After intervention, there was a significant difference in the mean and standard deviation of the effect of education on knowledge score (1.0±0.3), perceived sensitivity (2.8±1.5), perceived severity (3.6±1.7) Perceived barriers (-6.4±1.3), perceived benefits (5.1±4), self-efficacy (4.6 ± 2.6) and behavior( 3.1±1.1) was seen in the intervention group (P>0.05).
Conclusion By increasing the scores obtained from the structures Especially self-efficacy and reduction of perceived barriers, designing and implementing an educational program based on model in midwives can increase their performance regarding the prevention of nosocomial infections.
Maliheh Rahmani, Zahra Zanjani, Abdollah Omidi,
Volume 25, Issue 1 (3-2022)
Abstract
Background and Aim Various research studies have investigated the relationship between anxiety and worry. The present study aimed to examine the mediating role of cognitive emotion regulation and mindfulness in the relationship between anxiety and worry.
Methods & Materials The present study follows a correlational design study. The research sample included 248 students of Kashan universities in Iran studying in the 2017-2018 academic year. The study data were collected using the generalized anxiety disorder (GAD-7), Pennsylvania state worry questionnaire (PSWQ), the Persian short form of cognitive emotion regulation questionnaire (CERQ-P-short form), and five-factor mindfulness questionnaire (FFMQ). Then, the obtained data were analyzed using the SPSS v. 22 and AMOS v. 22 software.
Ethical Considerations The Ethics Committee of Kashan University of Medical Sciences approved the study (Code: IR.KAUMS.REC.1396.36).
Results The results showed a significant relationship between generalized anxiety and worry, worry and cognitive emotion regulation, worry and mindfulness, generalized anxiety and cognitive emotion regulation, and anxiety and mindfulness. The results of the structural equation modeling confirmed the mediating role of cognitive emotion regulation in the relationship between anxiety and worry. Also, the path coefficient of mindfulness and anxiety was removed from the model because it was not significant.
Conclusion Generally, cognitive emotion regulation plays a mediating role in the relationship between anxiety and worry. These findings seem applicable in the individual, family, educational, therapeutic, and interpersonal mental health fields.
Dr Rahmatolah Khosravanpoor, Dr Mahnoush Mahmoodi, Mr Marzieh Khosravanpoor, Dr Mahnoush Reisi,
Volume 25, Issue 4 (9-2022)
Abstract
Introduction: The use of digital games is highly prevalent among adolescents and can adversely affect their physical and mental health. The aim of this study was to determine the predictors of the stages of change in problematic digital games in high school students using a transtheoretical model.
Methods: This descriptive-analytical cross-sectional study was performed on 703 high school students in Bushehr 2020. A valid and reliable researcher-made questionnaire was performed for data gathering and analyzed using SPSS ver. 22 by descriptive indices, one-way ANOVA, chi-square, and rank ordered logistic regression. The present research was approved at Research Ethical Committee of Bushehr University of Medical Sciences (Code: IR.BPUMS.REC.1398.101).
Results: According to the results, self-efficacy, dramatic relief and social freedom were the predictors of the change stages of reducing and quitting digital games. This means that girls and students with higher self-efficacy (P = 0.037, OR = 1.054), have a better chance of being in higher stages of change and by increasing a unit of dramatic relief score (P = 0.025, OR = 1) and social freedom (OR = 1.135, P <0.001), the chances of individuals to be in the upper stages of change increased.
Conclusions: It seems that the design of educational interventions based on self-efficacy variables and taking into account the change processes of dramatic relief and social freedom, which increase the chances of people to be placed in higher stages of change, in reducing the behavior of digital games of students, especially for boys will be effective.
