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Background and purpose: The prevalence of metabolic syndrome in societies is increasing. Metabolic syndrome is a cluster of medical conditions that include obesity, hypertension, dyslipidemia, and insulin resistance. Poor dental care is linked to numerous systemic disorders. Scientific research supports the presence of a relationship between oral hygiene and metabolic syndrome. Therefore, the present study was conducted to determine the relationship between oral hygiene based on DMFT (decayed, missing, filled teeth) and metabolic syndrome in the registration phase data of the Tabari cohort population. Materials and methods: This study was cross-sectional and analytical and included participants from the Tabari cohort population who had performed oral health and metabolic syndrome assessments during the registration phase. Throughout the registration period of the Tabari cohort study (TCS), data was gathered from 10255 individuals ranging from 35 to 70 years old. This data was obtained from both urban and mountainous parts of Sari, Mazandaran, Iran, during the years 2015 and 2017. Data regarding education level, occupation status, residential location, socio-economic status, marital status, mental health history, smoking or hookah habits, daily physical activity, dental hygiene practices (such as tooth brushing and flossing frequency), denture usage and care, mouthwash usage, and DMFT index were gathered during the implementation of TCS through interviews and oral examinations. Metabolic syndrome was diagnosed based on the criteria of the third adult treatment panel (ATP III). Ultimately, SPSS version 27 software was utilized to describe the data using mean, standard deviation, and percentage. The qualitative variables were compared with the metabolic syndrome using the chi-square test, while the quantitative variables were compared using the independent t-test in univariate analysis. Furthermore, the process of adjusting for confounding variables was carried out through the utilization of multivariate logistic regression. Results: 9,939 people were included in the final analysis. Independent T-test result showed that there was no significant relationship between metabolic syndrome and DMFT (P=0.156, T=4.59), so the average DMFT in the group with metabolic syndrome was 17.66±9.07, whereas in the non-affected group, it was 16.81±8.99. Based on chisquare test results, significant relationships with metabolic syndrome were found for the use of dentures (P<0.001), use of dental floss (P<0.001), age (P<0.001), gender (P<0.001), marital status (P=0.05), occupation (P<0.001), place of residence (P<0.001), psychiatric disorders (P<0.001), socio-economic status (P=0.005), smoking (P<0.001), BMI (P<0.001), MET (P<0.001), and education level (P<0.001). Upon adjustment of confounders in the multivariable logistic regression model, only the number of flossing twice a day was significantly associated with metabolic syndrome (OR 1.493 [95% CI 1.008-2.213], P=0.046). Conclusion: The findings of this study showed that there is no significant relationship between oral and dental hygiene measured by the DMFT index and the presence of metabolic syndrome in the population registration stage data of the Tabari cohort. There was a significant relationship identified alone between flossing twice daily and metabolic syndrome. Further studies are necessary to explore other potential factors that may contribute to the development of metabolic syndrome in this population. [ABSTRACT FROM AUTHOR]

Background and purpose: Hypertension is a global problem due to its consequences. Recognizing warning signs and taking necessary measures are effective in preventing the disease and its complications. We used the logistic regression model to determine the factors affecting blood pressure based on the results of the Tabari Cohort Study. Materials and methods: This cross-sectional descriptive-analytical study was conducted in people older than 35 years old in Sari, whose information (demographic and anthropometric characteristics, and risk factors) was available at the Tabari Cohort Center in Mazandaran province. Logistic regression model was used to determine the factors affecting hypertension. We did statistical analyses using SPSS V26. Results: The participants included 6622 people (41.3% men) with an average age of 48.97±8.94 years old. There were 1481 people with high blood pressure (22.4%). According to multivariate logistic regression model, age (10-year period) (OR=2.04-8.11), body mass index (OR=1.72-2.35), total cholesterol (OR=1.34), triglyceride (OR=1.30), the ratio of waist to hip circumferences (OR=1.31), history of cardiovascular diseases (OR=2.09), and diabetes (OR=1.81) were among the factors associated with hypertension (P<0.05). Conclusion: According to the results of the multivariable logistic regression model, obesity management as the main factor and screening of people for diagnosis, follow-up, and prevention of hypertension are suggested. [ABSTRACT FROM AUTHOR]

Background: The study of the smoking and drug use profile of the Tabari cohort enrolment phase, the outcomes of which will be evaluated in the coming years, has proper comprehensiveness. Therefore, the present study aimed to determine the cigarette and drug use status in the population of the Tabari cohort study (TCS). Methods: In this study, the profile of cigarette and drug use in the TCS was evaluated. Data analysis was performed in SPSS version 24 using percentage, mean, and standard deviation, chi-square, and independent t test. Findings: The frequency of daily smoking in the entire population was 9.1%, and the frequencies in men and women were 21.5% and 0.6%, respectively (P < 0.001). The frequency of exposure to smoking in the home, at present or in the past, in the entire population was 30.5%, and in the populations living in urban and mountainous areas were 35.4% and 19.8%, respectively (P < 0.001). The mean age at first use of cigarettes in the entire population was 20.50 ± 7.61, whereas the mean age of regular smoking was 23.19 ± 8.02. Furthermore, the frequency of experiencing drug abuse in the total population was 6.1%, and the frequencies in men and women were 14.1% and 0.7%, respectively. Conclusion: According to the results of this study, cigarette smoking and drug use are significant in men, and overall exposure of the Tabari cohort population to tobacco and drugs in the home is high. If effective prevention is not on the agenda, a significant proportion of the future outcomes in this population may be attributable to these risk factors. [ABSTRACT FROM AUTHOR]

Background and purpose: Red Cell Distribution Width (RDW) is a parameter that measures changes in red blood cell size reported in a complete blood count test. In this study, we aimed to identify the association between RDW and hypertension in Tabari cohort population. Materials and methods: In this case-control study, case group included all patients with hypertension (n= 2281) participating in Tabari Cohort Study with systolic and diastolic blood pressures more than or equal to 140 and 90, respectively, or those previously diagnosed with hypertension who received antihypertensive drugs. The control group was randomly selected from the Tabari cohort population and matched for sex, age and body mass index. Finally, 2227 people were included in each group. Blood samples were taken from all participants after 12 hours of fasting. Results: Findings showed significant differences between the two groups in all variables studied, including place of residence, level of education, socio-economic status, waist circumference, smoking, and cholesterol level (P<0.05) except triglyceride level (P=0.111). Independent t-test showed that RDW in different quarters was not significantly different between the case group and control group. (P= 0.584). Univariate and multivariate regression tests also did not show a significant relationship between RDW and blood pressure (P>0.05). Conclusion: Our study showed that RDW has no predictive role in hypertension and there is no significant pattern between the range of RDW and hypertension. [ABSTRACT FROM AUTHOR]

BACKGROUND AND OBJECTIVE: Identification of cancer risk factors in the community and prevention planning in high-risk groups can be helpful in cancer prevention program. Hence, the aim of this study was to investigate the relationship between reproductive factors and breast cancer in the Tabari population-based cohort study in a case-control design. METHODS: This case-control study was performed on the enrolment phase of the Tabari population-based cohort. Patients with breast cancer were considered as case group (51) and non-cancerous individuals (204) as a control group. The two groups were matched based on age category and oral contraceptive pill (OCP) intake. The studied variables included breast cancer history, demographic and reproductive factors. FINDINGS: Mean age of first pregnancy (22.76±4.99 vs. 20.8±4.16, p=0.005), mean age at first birth (23.57±4.94 vs. 21.66±4.07, p=0.006) and age of marriage (22.24±5.75 vs. 19.54±4.92, p=0.001) in the case group were significantly higher than the control group and the number of pregnancies (3.76±2.22 vs. 4.67±2.76, p=0.032) and number of children (3.27±1.97 vs. 4.16±2.44, p=0.019) in the case group was significantly less than the control group. According to multivariate analysis, the odds of incidence of breast cancer in people with first pregnancy over 22 years was 2.76 times more than (p= 0.027) those with first pregnancy age below 22 years. CONCLUSION: "Age at first full-term pregnancy" is one of the major risk factors for breast cancer in the area. [ABSTRACT FROM AUTHOR]

Background: The Tabari cohort study (TCS), part of the Prospective Epidemiological Research Studies in IrAN (PERSIAN), is a large longitudinal prospective cohort designed to better understand the risk factors associated with major non-communicable diseases (NCDs) across two urban and mountainous regions in north of Iran. Methods: The enrollment phase of TCS started in June 2015 and ended in November 2017. During this phase, individuals aged 35--70 years from urban and mountainous regions of Sari township (Mazandaran province) were invited to the cohort center by health volunteers (urban regions) and Behvarz (mountainous areas) using census information. Data was collected based on the PERSIAN cohort study protocols. Hypertension was defind as systolic blood pressure ≥140 mm Hg or a diastolic blood pressure ≥90 mm Hg or history of diagnosis with hypertension or taking antihypertensive medications among participants free from cardiovascular diseases. Diabetes was defined as fasting blood sugar ≥126 mg/dL or a history of diagnosis or taking glucoselowering medications among all participants. Results: A total of 10,255 participants were enrolled in TCS, 59.5% of whom were female. Among the total population, 7,012 participants were urban residents (68.4%). The prevalence of daily smoking in the total population was 9.1%. Body mass index in 75.9% of participants was ≥25 kg/m². The prevalence of hypertension, diabetes, and thyroid disorders were 22.2%, 17.2%, and 10.5%, respectively. Conclusion: The Tabari cohort is different from other cohorts in terms of levels of risk factors associated with NCDs. This study has certain important strengths including its population-based design and large sample size that provides a valid platform for conducting future investigations and trials. A biobank that has been designed to store blood, nail, hair and urine samples for future research is another strength of this study. Researchers who are interested in using the information can refer to the following web page: http://persiancohort.com. [ABSTRACT FROM AUTHOR]