جستجوی مقالات مرتبط با کلیدواژه « statistical » در نشریات گروه « پزشکی »

The development of societies relies on the type and manner of activities performed at universities. Professors play a pivotal role in the development of universities and societies. Assessment of professors’ motivation and behavior and factors affecting them can improve the educational system and increase its performance. This study aimed to assess the validity and reliability of the Physician Teaching Motivation Questionnaire (PTMQ) from the viewpoint of clinical professors at Iran University of Medical Sciences (IUMS).

This is an instrument psychometric study in which the questionnaire’s validity was determined through the face and content validity and its construct validity through exploratory and confirmatory factor analysis. Reliability was determined through the calculation of Cronbach’s alpha and intraclass correlation coefficient and consistency between agreers. The data were analyzed in SPSS 23 and LISREL 8.8.

The results showed that all 18 items had acceptable content validity (0.68-0.97). The Cronbach’s alpha and intraclass correlation coefficients were 0.81 and 0.86, respectively. The number of items remained unchanged at 18 according to exploratory factor analysis which classified them into six categories (intrinsic motivation, identified motivation, introjected motivation, career motivation, external motivation, and teaching assistant motivation) and explained 54% of the total variance of the mentioned variables. Also, the value of CFI was equal to 0.93 and the value of Cohen’s kappa was between 0.77 and 0.84.

The Persian version of PTMQ is a valid and reliable instrument that can be used for research, educational, and practical purposes to evaluate the teaching motivation of clinical professors in other groups.

Valid and reliable tools are required to measure non-nutritive sucking and oral feeding readiness of preterm infants. The aim of this study was to translate the Non-Nutritive Sucking scoring system (NNS) into Persian language and to evaluate its measurement properties.

A cross-sectional study was conducted to translate and cross-culturally adapt the NNS to Persian language (P-NNS) following steps described in guidelines. Eighty-eight preterm infants participated in this study. Psychometric properties of floor/ceiling effects, internal consistency reliability, inter-rater reliability, Standard Error of Measurement (SEM), Smallest Detectable Change (SDC) and construct validity were tested. Factor analysis was performed to determine the P-NNS structure.

There were no floor or ceiling effects that indicate the content and responsiveness of P-NNS. Internal consistency was high (Cronbach’s α 0.905). Item–total correlations exceeded acceptable standard of 0.3 for the all the items (0.3–0.9). The inter-rater reliability was excellent (k=0.91, SE=0.04; p<0.001). SEM and SDC were 8.04 and 22.28, respectively. Construct validity was supported by a significant correlation between the P-NNS total score and the Persian version of the Early Feeding Skills (EFS) total score (r=0.94, p<0.001). Explanatory factor analysis revealed 2 components for p-NNS.

The P-NNS was cross-culturally adapted to Persian and demonstrated to be a reliable and valid instrument to measure non-nutritive sucking and oral feeding readiness of preterm infants.

Students are a significant source of data for the evaluation of clinical instructors’ performance. This study was undertaken with the aim of adaptation and validation of the Persian version of the Maastricht Clinical Teaching Questionnaire (MCTQ). The main objective of the researchers in this study was to evaluation the psychometric properties of the Persian version of the Maastricht Clinical Training Questionnaire (P-MCTQ) in Iran, considering cultural and social differences.

This methodological study was conducted from 2019 to 2021 at four teaching hospitals affiliated with Sabzevar University of Medical Sciences, Iran. Qualitative and quantitative face and content validity, and construct validity methods were used for the validity evaluation. Stability and internal consistency methods were used, respectively, for the reliability evaluation of the questionnaire. Exploratory Factor Analysis (EFA) stage, 264 students studying in the fields of nursing, midwifery, anesthesiology, operating room, emergency medicine, and laboratory sciences completed the P‑MCTQ.

The value of scale-content validity index (0.92) is indicative of the overall content validity of the questionnaire. EFA extracted a single‑factor structure that could explain the overall variance of the clinical education structure at about 76.61%. The alfa and intraclass correlation values were equal to 0.98 and 0.82, respectively, indicating the excellent internal consistency and high overall stability of the questionnaire.

The P‑MCTQ is a valid and reliable tool for the evaluation of the teaching performance of clinical instructors.

In countries with evolving prehospital trauma care systems, it is recommended that volunteers especially youth can be trained to perform as first responders to render basic emergency care until care by formally trained health-care personnel’s is available. Based on the theory of planned behavior (TBP), the present study aims to predict intention to help road accident victim among young adults in a fast-urbanizing Indian city.

A cross sectional survey was conducted among 695 college students of Jodhpur, Rajasthan by self-administered questionnaire based on theory of planned behavior (TPB). Predictor of behavioral intention to help an accident victim was assessed through partial least square structural equation model (PLS-SEM).

Theory of planned behavior provided a reliable and valid framework for predicting intention of college students towards helping an accident victim. Perceived confidence (? = 0.344, p less than 0.001); attitude (? = 0.323, p less than 0.001) and social norm (? = 0.251, p less than 0.001), all emerged as the significant direct predictor of intention. Perceived confidence also significantly predicted social norm (? = 0.370, p less than 0.001) and attitude (? = 0.281, p less than 0.001). Further, attitude towards helping an accident victim was also influenced by social norm (? = 0.366, p less than 0.001).

Based on framework of TPB, role of perceived confidence, social norm and attitude is found to significantly predict intention among college youth towards helping an accident victim. Public health interventions designed towards engaging and training youth as first responders in countries with fragmented pre-hospital trauma care systems need to encompass these aspects by establishing community based training programs for potential first responders and recognition of good Samaritans.

To improve current practices and create the most effective healthcare waste treatment system, solid medical waste composition needs to be analyzed. This  study aims to develop models to predict the rate of medical waste production in hospitals in Hilla city, Iraq. Predictive mode can be used to set standards, evaluate current methods for treating and disposing medical waste, and optimize healthcare solid waste management systems.

Predictive models and long-term data on the composition and rate of solid medical waste generation were developed using a longitudinal study design. A standardized questionnaire and weighted scale were used to measure solid medical waste generated from the five public hospitals. Statistics were used to create models predicting the amount of waste generated at each hospital.

These models demonstrated a significant correlation between inpatient and outpatient numbers and waste generation. Different hospitals treat different numbers of inpatients and outpatients. Different models have been created based on various types of hospitals.

Linear rule-based models accurately represent the weights of variables, identify the sources and implications of solid medical waste, and control waste levels by using a variety of parameters. The research model can help in the development of an effective strategic plan for setting up a medical solid waste (MSW) management system.

 Advancing a culture of care greatness, at distinctive levels of management and care such as nursing management, has created way better desires and inspiration.

 To design a suitable model for measuring the quality of nursing services management in selected universities of medical sciences in Iran.

 This was exploratory mixed research. In the qualitative stage, the data collection tool was interview. Semi-structured interviews with 12 experts and university professors were used. Qualitative data is first collected, then, based on the findings of qualitative data, research tools are taken, and quantitative data are collected. Categories are extracted after implementing the discussions on paper, open coding (reading the data line by line, extracting the main concepts and sentences, forming the first categories and classes) and axial coding (data classification, subcategory specification, final class formation). In the next step, there is optional coding. The statistical population in this study is all nurses in Tehran, Kermanshah and Guilan, totally 255 people. A researcher-made questionnaire was used to collect data in a quantitative phase. 152 completed questionnaires were collected from the samples. After collecting the questionnaires, it was statistically analyzed. Confirmatory factor analysis was used to evaluate the validity of the questionnaire, and structural equation modeling (SEM) with the help of SmartPLS 3 software was used to evaluate the research questions.

 Factors affecting the quality of nursing services management in Tehran, Kermanshah and Guilan Universities of Medical Sciences are: individual factors, educational factors, motivational factors, international factors, social factors, environmental factors, intra-organizational factors and technological factors.

 The Proposed model has a strong fit. Suggestions based on the research results are: Evaluation of training courses, repetition of skills in the program by the trainee should be predicted so that the skill in the person becomes a behavioral habit and, in fact, behavioral consolidation, repetition of skills in the program by the trainee should be so in order for a skill to become a behavioral habit in the individual and in fact to be behaviorally established, the difference between individuals must be identified.

Heart failure (HF) is an important public health issue whose prevalence, hospitalization rate, and costs have increased over the years. Treatment adherence is the behavior of the patient in taking medications, correcting diet, and ability to change lifestyle with the recommendations of the health care provider. Poor treatment adherence contributes to worsening disease outcomes. Currently, according to the literature, no specific instrument is available to measure treatment adherence of HF patients.

The aim of this study was to develop and evaluate the heart failure treatment adherence questionnaire (HFAQ) for military personnel and their family.

Items were generated by literature review, patient field interviews, and expert opinions. Content validity was assessed by measuring CVR and CVI, while face validity was evaluated by measuring the impact score of each item. The research team performed EGA, bootEGA, and CFA to assess the construct validity, and reliability was assessed by measuring ICC and Cronbach’s alpha.

Item pool with 86 items was generated consisting of 45 medications, 10 lifestyles, nine diet items, and 22 common items between these three categories. Forty-three items with CVR score lower than 0.62 were removed from the HFAQ. All remained items had acceptable face validity. Cronbach’s alpha and ICC of HFAQ were reported as 0.73 and 0.97, respectively. EGA results represented a four-dimension model for HFAQ with a relatively narrow confidence interval (CI 95% [3.769, 4.231]), and the stability of items, in constructs, ranged from 0.96 to 1. Goodness-of-fit results was reported as χ2 = 535.657, df = 293, χ2/df = 1.828, P-value < .001, CFI = 0.851, and RMSEA = 0.050.

HFAQ is the first treatment adherence questionnaire developed specifically for assessing treatment adherence of HF patients and is a valid and reliable 26-item questionnaire that evaluates patients' treatment adherence in three main contexts of medication, physical activity, and diet. HFAQ has four dimensions of health literacy, social and economic, barrier, and patient-provider relationship, which can be used as an intervention for improving treatment outcomes and disease burden.

Considering the importance of cardiovascular disease (CVD) risk prediction for healthcare systems and the limited information available in the Middle East, we evaluated the SCORE and Globorisk models to predict CVD death in a country of this region.

We included 24 427 participants (11 187 men) aged 40-80 years from four population-based cohorts in Iran. Updating approaches were used to recalibrate the baseline survival and the overall effect of the predictors of the models. We assessed the models’ discrimination using C-index and then compared the observed with the predicted risk of death using calibration plots. The sensitivity and specificity of the models were estimated at the risk thresholds of 3%, 5%, 7%, and 10%. An agreement between models was assessed using the intra-class correlation coefficient (ICC). We applied decision analysis to provide perception into the consequences of using the models in general practice; for this reason, the clinical usefulness of the models was assessed using the net benefit (NB) and decision curve analysis. The NB is a sensitivity penalized by a weighted false positive (FP) rate in population level.

After 154 522 person-years of follow-up, 437 cardiovascular deaths (280 men) occurred. The 10-year observed risks were 4.2% (95% CI: 3.7%-4.8%) in men and 2.1% (1.8-2%.5%) in women. The c-index for SCORE function was 0.784 (0.756-0.812) in men and 0.780 (0.744-0.815) in women. Corresponding values for Globorisk were 0.793 (0.766-0.820) and 0.793 (0.757-0.829). The deviation of the calibration slopes from one reflected a need for recalibration; after which, the predicted-to-observed ratio for both models was 1.02 in men and 0.95 in women. Models showed good agreement (ICC 0.93 in men, and 0.89 in women). Decision curve showed that using both models results in the same clinical usefulness at the risk threshold of 5%, in both men and women; however, at the risk threshold of 10%, Globorisk had better clinical usefulness in women (Difference: 8%, 95% CI: 4%-13%).

Original Globorisk and SCORE models overestimate the CVD risk in Iranian populations resulting in a high number of people who need intervention. Recalibration could adopt these models to precisely predict CVD mortality. Globorisk showed better performance clinically, only among high-risk women.

The aim of the present study was to develop and evaluate the psychometric properties of an instrument in Persian to assess the mothers’ knowledge, and perception about oral health of school children.

A sequential exploratory mixed method design consisting of qualitative and quantitative phases was performed. We developed the questionnaire by inductive-deductive method, through a synthesis of literature review and a qualitative study with semi-structured interviews and focus group discussions. Face and content validity of the items were assessed by consulting a panel of 11 experts. In the quantitative phase, an exploratory factor analysis was performed using data from a cross-sectional study with a sample of 303 mothers. Reliability analysis with test-retest approach and Cronbach’s alpha coefficient and intra-class correlation coefficient (ICC) was done.

Pre-final version of the scale consisted of 120 items extracted from the qualitative study and literature review. After content and face validity, 92 items were chosen with the greatest agreement between experts, with a content validity index (CVI) >0.8 and content validity ratio (CVR) of 0.59. The final questionnaire covered 62 items. The overall Cronbach’s alpha was 0.94 and it ranged from 0.87 to 0.97 for the subscales. The ICC ranged from 0.91 to 0.98 (Cronbach's alpha ≥0.70).

The present study introduced a valid and reliable questionnaire for assessment of the mothers’ perception regarding school children’s oral health. It can be used as a standardized measure for public health surveillance and evaluation of oral health promotion programs.

Resilience is the process of one’s relatively positive adaptation to traumatic experiences. This study aimed to measure the psychometric parameters of the Persian version of the Adolescent Resilience Scale (ARS) among a group of gifted Iranian students.

In this cross-sectional study, 347 gifted adolescents (148 boys and 199 girls) in the academic year 2019-2020 filled out ARS. Confirmatory factor analysis (CFA) and multi-group confirmatory factor analysis (MGCFA) were employed to examine the factorial validity and the gender-based equivalence of the factorial structure of this scale, respectively. AMOS V24.0 was used to analyze the data.

The results of CFA in AMOS showed that after establishing a covariance between error residuals for some pairs of items, the triple-factor version of ARS (consisting of novelty seeking, emotional regulation, and positive future orientation) was well fitted with the data in both groups of boys and girls (RMSEA=0.060). MGCFA results also revealed the inter-group invariance of the factorial structure, factor loading, error values, and inter-factorial variance and covariance of ARS among the gifted male and female students (p <0.001). The internal consistency coefficient was obtained to be 0.82 for novelty seeking, 0.73 for emotional regulation, and 0.70 for positive future orientation.

The study findings provided new empirical evidence on the factorial structure and measurement invariance of ARS. The Persian version of ARS was a valid and reliable tool to measure psychological resilience.

The purpose of the present study was to examine the validity and reliability of the Persian version of the Weight Control Strategies Scale among individuals engaged in weight loss or weight maintenance.

This descriptive study conducted from October 2019 to February 2020 on social media networks. A total of 420 men and women were selected using consecutive sampling. They completed the Persian version of the Weight Control Strategies Scale and the Self-Compassion Scale. Data were analyzed using descriptive statistics, Cronbach’s α, confirmatory factor analysis, and Pearson product-moment correlations.

Internal consistency for the total score of the Persian version of Weight Control Strategies Scale was excellent and acceptable to good for all 4 subscales (in all cases over α = 0.70). Confirmatory factor analysis supported the factor structure of the original model of the scale, but, it was different from the model at the item level. Moreover, the Persian version of Weight Control Strategies Scale had good convergent validity.

Psychometrically speaking, the Persian version of the Weight Control Strategies Scale is a valid and reliable tool to assess the psychological and behavioral profile of individuals engaging in losing or maintaining weight, both for clinical and research purposes.

Detecting the latent dimensions of quality of life as affected by oral diseases is essential for promoting oral health in children. This study aimed to test the Early Childhood Oral Health Impact Scale (ECOHIS) via an appropriate method to detect its dimensions of quality of life as affected by oral diseases. An analytical cross-sectional study was carried out in Shiraz, Iran, between 2014 and 2015. A multistage stratified design was used to select 830 parents or the guardians of primary school children aged six years. The Farsi version of the Early Childhood Oral Health Impact Scale (F-ECOHIS) was used to evaluate the children’s oral health-related quality of life. The parents were interviewed to collect data on ECOHIS. Mplus, version 7, was employed for descriptive and analytical analyses in the present study. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were performed to extract and verify the latent dimensions of ECOHIS. Out of the 830 invited parents or guardians, 801 participated in this study. The mean ECOHIS score was 21.95±7.45. The mean child impact score and the mean family impact score were 14.25±5.72 and 7.70±3.62, respectively. EFA yielded a 3-factor model: symptom and function, social interaction, and family impact. CFA confirmed the 3-dimensional model (root mean square error of approximation=0.045). The fit indices of the 1- and 2-dimensional models (the child and family domains) were not within the acceptable range. F-ECOHIS is a 3-dimensional model rather than the hypothetical 6-dimensional model. ECOHIS appears to be a useful scale for measuring the multidimensional impact of oral diseases in children.

Fear of compassion is one of the psychological variables in the nursing profession that can be a barrier to providing appropriate services to patients. This research was done in order to assess psychometric properties, construct validity, reliability of fear of compassion scales and to introduce suitable measures for experts and researchers in the healthcare‑related fields.

In this study, 216 nurses (117 males and 99 females) were chosen with a multistage cluster sampling method between June 2016 and Feb 2017. Lisrel‑8 and SSPS‑18 were used for data analysis. The construct validity of the fear of compassion scales was assessed using confirmatory factor analysis. To assess the divergent and convergent validity of the fear of compassion scales, the compassion for others, depression, anxiety, stress, burnout, and cognitive emotion regulation questionnaires were used.

The results of confirmatory factor analysis showed that the single‑factor model of fear of compassion scales (for others, from others, and for self) is a better fit to the data. Furthermore, these three scales had a positive and significant correlation with anxiety, depression, stress, burnout, and unhealthy cognitive‑emotion regulation strategies, and negative and significant correlation with compassion for others and healthy cognitive‑emotion regulation strategies. In addition, the Cronbach’s alpha coefficient for fear of expressing compassion to others was 0.85, and 0.95 and 0.96 for fear of responding to compassion from others and fear of self‑compassion, respectively.

This study provides additional evidence for the psychometric properties of fear of compassion scales in Iranian nurses.

The Gail model is the most well-known tool for breast cancer risk assessment worldwide. Although it was validated in various Western populations, inconsistent results were reported from Asian populations. We used data from a large case-control study and evaluated the discriminatory accuracy of the Gail model for breast cancer risk assessment among the Iranian female population.

We used data from 942 breast cancer patients and 975 healthy controls at the Cancer Institute of Iran, Tehran, Iran, in 2016. We refitted the Gail model to our case-control data (the IR-Gail model). We compared the discriminatory power of the IR-Gail with the original Gail model, using ROC curve analyses and estimation of the area under the ROC curve (AUC).

Except for the history of biopsies that showed an extremely high relative risk (OR=9.1), the observed ORs were similar to the estimates observed in Gail's study. Incidence rates of breast cancer were extremely lower in Iran than in the USA, leading to a lower average absolute risk among the Iranian population (2.78, ±SD 2.45). The AUC was significantly improved after refitting the model, but it remained modest (0.636 vs. 0.627, ΔAUC = 0.009, bootstrapped P=0.008). We reported that the cut-point of 1.67 suggested in the Gail study did not discriminate between breast cancer patients and controls among the Iranian female population.

Although the coefficients from the local study improved the discriminatory accuracy of the model, it remained modest. Cohort studies are warranted to evaluate the validity of the model for Iranian women.

Sleep health can be defined as a multidimensional pattern of sleep-awakening that is consistent with individual, social, and environmental needs and its absence endangers physical and mental wellbeing. The objective of the present study was to validate the Sleep Health Scale (SHS).

The population for this study consisted of all nurses in Arak Province, Iran, including 130 participants who were selected using the available sampling method (simple sampling). Data collection was based on the SHS by Buysse, which resulted in 120 completed questionnaires. SPSS software was used for exploratory factor analysis (EFA), reliability, and correlation between questions, and AMOS was used for confirmatory factor analysis (CFA). This scale was translated from English to Persian and then was back-translated from Persian to English. The questionnaire was examined in terms of cultural sensitivities, clarity of questions, conflicts, and errors in meaningfulness by a panel of experts.

Cronbach’s alpha coefficient for the questionnaire was 0.89; hence, the questionnaire was reliable. Factor loadings’ examination using EFA and CFA showed 0.77 and 0.80 for the questions and this confirmed an acceptable construct validity. All items showed acceptable correlation (0.82 to 0.84). The results of test-retest reliability showed stability over time (r = 0.83) for sleep health assessment.

The Persian version of the questionnaire has acceptable validity and reliability and can be used for sleep health assessment, along with other questionnaires.

The current study aimed at validating the 26-item Suinn-Lew Asian Self-Identity Acculturation scale (SL-ASIA) using confirmatory factor analysis (CFA) in first-generation young adult Middle Eastern (ME) migrants, and also exploring the agreement between the outcomes of linear and orthogonal approaches of acculturation using SL-ASIA. The CFA and convergent and discriminant validity measures were employed to validate the original linear SL-ASIA and the subsequently designed orthogonal SL-ASIA for first-generation young adult ME migrants in Australia (n = 382). Cohen’s Kappa coefficient was used to measure the agreement between classifications obtained by the linear and orthogonal methods of measuring acculturation. The CFAs of the initial six-factor 21-item linear scale and the two-factor five-item orthogonal scale indicated poor fits. However, after model specification and validation, satisfactory fit and validity indices were achieved for the modified scales. The validated linear SL-ASIA comprised five factors and 15 items, and the validated orthogonal SL-ASIA comprised two factors and four items. The Kappa coefficient showed a high level of consistency between the linear and orthogonal models of acculturation, confirming that the use of either scale can lead to similar research outcomes. The study also supports the use of the validated linear and/or orthogonal scales to measure acculturation. This finding responds to the existing gap in the literature that until now, no acculturation scale is validated for ME migrants, and also no study is conducted to validate the orthogonal SL-ASIA.

Among different factors, self-efficacy is one of the most suitable components for predicting smoking behavior among adolescents. Therefore, it is essential to design a native tool to measure this high-risk behavior in adolescents and implement prevention programs in this age group.

This study aimed to design and validate a smoking abstinence self-efficacy questionnaire in female adolescents.

In this methodological study, a comprehensive literature review was conducted, and the available similar questionnaires were used to prepare the items. In total, 351 female schoolchildren were selected by convenience sampling in Mashhad, Iran, between October 2017 and January 2018. Face and content validity and construct validity were applied for psychometric evaluation of the developed tool. The reliability of the tool was tested by internal consistency.

The final version of the smoking abstinence self-efficacy scale in Iranian female adolescents includes 16 items after a psychometric evaluation. The content validity of the tool was obtained at 0.99. Moreover, exploratory factor analysis explored three factors of emotional, social, and high-risk situations explaining 60% of the variance. Cronbach's alpha coefficient of the questionnaire was estimated at 0.94.

The smoking abstinence self-efficacy scale is a valid and reliable tool among Iranian female adolescents derived from the native context of this group of people which can examine smoking abstinence self-efficacy in three dimensions of emotional, social, and high-risk situations. Moreover, it can identify adolescents with different levels of smoking abstinence self-efficacy.

The United States Department of Health and Human Services (USDHHS)recommends that adults achieve 150 minutes per week of moderate-intensity aerobic activity.Most African American women do not meet these guidelines. The purpose of this study was to determine the efficacy of an intervention based on the fourth generation, multi-theory model (MTM) of health behavior change for initiating and sustaining physical activity among African American women when compared to a first generation, knowledge-based intervention. The randomized controlled trial (RCT) utilized a pre-test, post-test and 6-week followup evaluation with an experimental (n=25) group and a comparison group (n=23). Process evaluation for satisfaction and program fidelity was conducted along with impact evaluation for changes in MTM constructs, intent to initiate and sustain physical activity, minutes of physical activity, body mass index (BMI), waist circumference and blood pressure in hypertensives. The MTM-based intervention proved significantly efficacious in increasing the minutes of physical activity from pre-test mean of 37 minutes to 172 minutes at follow-up (mean difference135.08 minutes, 95% CI: 106.04 to 164.13, P<0.0001), reducing waist circumference from pretest mean of 39 inches to 38 inches at follow-up (mean difference -1.12 inches, 95% CI: -1.70 to-0.545, P<0.001) and modifying the MTM construct of changes in physical environment from a mean of 7 units at pre-test to 9 units at follow-up (mean difference 2.08 units, 95% CI: 0.73 to 3.43, P<0.004) when compared to the knowledge-based intervention over time. There were directional improvements in the mean scores for most of the study variables over time for the MTM intervention group and statistically significant improvement in minutes of physical activity and waist circumference.

Electro-oxidation is developed as an electrochemical method to overcome the problems of the conventional decolorization technologies and is an appropriate alternative for the treatment of colored wastewater from various industries. The purpose of this study was to evaluate the efficiency of the electrochemical oxidation process in removal of chemical oxygen demand (COD) and Acid Red 18 (AR18) dye from aqueous solutions. In this research, a laboratory scale of electro-coagulation reactor for the treatment of synthetic wastewater was made and studied. The effects of different variables including pH, current density, dye concentration, and electrolysis time were investigated. The experiment steps were designed by Design-Expert 10 software using the selected variables. Finally, the dye and COD analysis was performed by spectrophotometer. The optimization was performed using Taguchi fractional factorial design during the removal of dye and COD. Maximum removal of dye (89%) and COD (72.2%) were obtained at pH=3, current density=20 mA/cm2, initial dye concentration=100 mg/L, and reaction time=45 min. ANOVA test showed a significant relationship between statistical model and test data. Also, the results indicate that the distribution of the residues of the model was normal. By designing experiments through Taguchi method, the removal process will be optimized and by decreasing the number of experiments, the optimal conditions for pollutant removal will be prepared. The results suggest that the Electro-oxidation system is a very suitable technique for the enhancement of wastewater treatment.