in 2030 . Besides, the harmful effect of smoking is not limited to active tobacco smokers. Eviden... more in 2030 . Besides, the harmful effect of smoking is not limited to active tobacco smokers. Evidence represents that passive smokers are susceptible to the detrimental effects of cigarette smoke as much as active smokers [5] and 0.9 million smoking-related deaths annually belong to passive smokers . A meta-analysis study reported that 20% of Iranian males are smoking . Another study in 2016 on the Iranian adult population demonstrated that the prevalence of current tobacco use for men and women was 24.4% and 3.8%, respectively . Some evidence illustrated the increasing smoking rate among young Iranian adults . In studies on the health effects of smoking, various investigations have examined the impact of tobacco on end products of hematopoiesis . However, the impact of smoking on hematopoiesis end products has not been adequately identified, and the results are BMC Cardiovascular Disorders
The relationship between dietary inflammatory index and metabolic syndrome in patients with rheumatoid arthritis
Nutrition & Food Science, Dec 17, 2021
Purpose Inflammation plays a significant role in incidence of metabolic syndrome (MetS), whose ri... more Purpose Inflammation plays a significant role in incidence of metabolic syndrome (MetS), whose risk can be reduced through modifying the diet. Considering the importance of incidence of MetS among patients with rheumatoid arthritis (RA), this study aims to determine the relationship between dietary inflammatory index (DII) and MetS in these patients. Design/methodology/approach This study was performed on 261 adults 35–65 years of age suffering from RA. The patients were among the participants in Ravansar non-communicable disease prospective study. DII was calculated based on food frequency questionnaire. The components of MetS were measured according to the protocol of prospective epidemiological research studies in Iran cohort. Data analysis was carried out using univariate and multivariate logistic regression model by modifying the confounding variables. Findings In patients with RA, prevalence of MetS was 37.5%. The mean of DII in RA patients with MetS and without MetS was −2.3 ± 1.5 and −2.2 ± 1.6, respectively, with no significant difference between two groups. After modifying the variables of age and gender, the odds of increasing waist circumference (WC) were near 1.9 times greater in the fourth quartile (pro-inflammatory diet) compared to the first quartile of DII (anti-inflammatory diet) (P = 0.03). The odds of developing hypertension was approximately 1.3 times greater in the fourth compared to the first quartile of DII (P = 0.034). The odds of developing MetS increased by 27% in the fourth quartile in comparison to the first one, though this increase was not statistically significant. Originality/value In RA patients, with increase in DII score, the WC and blood pressure had increased. The DII had no significant relationship with MetS. Further studies are essential across larger populations to confirm the findings.
This study was conducted to investigate the association between decayed, missing, and filled teet... more This study was conducted to investigate the association between decayed, missing, and filled teeth (DMFT) index and nutritional status measured by Healthy Eating Index 2015 (HEI-2015), in Iranian adults. In this cross-sectional study, data from the Ravansar non-communicable diseases cohort study were analyzed. DMFT index was employed as a measurement of oral health. The HEI-2015 score was calculated based on data obtained from Food Frequency Questionnaire and categorized into quartiles. Linear regression models were used to assess the association between HEI-2015 and DMFT. From total of 7549 participants with the mean age of 45.65 ± 7.70, 3741 of them were female (49.56%). The mean of DMFT in the highest quartile of HEI-2015 was lower than the lowest quartile (12.64 ± 7.04 vs. 14.29 ± 7.54, P < 0.001). The mean of DMFT in subject who had higher socioeconomic status (SES (was significantly lower than those with low SES (P < 0.001). The mean of DMFT in the lowest quartile of HEI-2015 was significantly lower than in the highest quartile, after adjusting for confounding variables (ß = -0.11, 95% CI -0.54, -0.30). The increasing dairy intake (β = -0.08, 95% CI -0.13, -0.03) was associated with decreasing DMFT score and increasing refined grains (β = 0.20, 95% CI 0.02, 0.35) and sodium (β = 0.07, 95% CI 0.02, 0.12) intake was significantly associated with increasing DMFT score. A healthy diet was associated with a decrease in DMFT score in the studied population. Following a healthy diet is recommended for oral health. The status of teeth and the digestive system have an essential role in the body's health status, and it requires regular evaluation. One of the most common index for assessing dental caries and dental treatment needs is DMFT. It has been used for about 75 years and counts the number of decayed, missing and filled teeth 1 . A meta-analysis study in 2018 indicated that the DMFT index of Iranian children and adults is 2.30 and 8.60, respectively 2 . Many studies have shown that there is an association between tooth loss and chronic diseases such as obesity, diabetes (T2DM), cardiovascular diseases (CVDs), some kinds of cancers, and all-cause mortality 3-6 . Nutrition is a factor that has a significant correlation with DMFT 7,8 . The ability to chew is reduced in people who lose more teeth. Therefore, there may be changes in their dietary choices including reduced consumption of solid foods such as fruits and vegetables, nuts, and cooked meats. This can lead to the deficiency in essential nutrients . The Healthy Eating Index (HEI) is a valid index for the measurement of diet quality. It was developed by the US Department of Agriculture to monitor the intakes of the US population. The algorithm of HEI-2015 scoring is based on 2015-2020 Dietary Guidelines for Americans (DGA), using recommended intakes for food groups and nutrient, which are related to health 13 . The HEI-2015 index measures two crucial aspects of nutrition: First, adequacy by measuring nine foods items; and second, moderation for dietary intakes by measuring four food items . Since there are few investigations about DMFT and nutritional status in Iran, this study was conducted to investigate the association between DMFT index and nutritional status based on HEI-2015 among Iranian adults.
it has been suggested that abdominal obesity might be a better cardiovascular diseases (cVDs) dis... more it has been suggested that abdominal obesity might be a better cardiovascular diseases (cVDs) discriminator than overall obesity. the most appropriate obesity measures for estimating cVD events in Kurdish populations have not been well-recognized. the objective of the present study was, therefore, to determine the cutoff points of BMI, waist circumference (WC), waist-to-hip ratio (WHR), and waist to height ratio (WHtR) as the diagnostic cut-offs to discriminate the prevalent cardiovascular diseases. The data collected from Ravansar Non-Communicable Disease (RaNCD) cohort, the first Kurdish population-based study, was analyzed. the information related to BMi, Wc, WHR and WHtR of 10,065 adult participants in the age range of 35-65 was analyzed in this study. Receiver operating characteristic (ROC) analyses were conducted to evaluate the optimum cut-off values and to predict the incidence of cardiac events. the results showed that WHtR had the largest areas under the Roc curve for cardiac events in both male and female participants, and this was followed by WHR, Wc, and BMI. The optimal cut-off values for determining the cardiac events in the Kurdish population were BMI = 27.02 kg/m 2 for men and BMI = 27.60 kg/m 2 for women, WC = 96.05 cm in men and 99.5 cm for women, WHRs = 0.96 in both sexes, and WHtR = 0.56 for men and 0.65 for women. The current study, therefore, showed that WHtR might serve as a better index of prevalent cardiac event than BMI, WHR and Wc. Obesity, especially central obesity, is defined as fat accumulation around the abdominal area. While obesity is increasing worldwide, it is associated with the risk of cardiovascular diseases (CVDs) 1,2 . Among Iranian adults, 34.8% are overweight and 18.8% are obese 3 . The most common cause of mortality in both developed and developing countries is related to CVDs, imposing many costs on the health care systems 4 . Central obesity has adverse effects on cardio-metabolic indices, including insulin resistance, hypertension and dyslipidemia . At present, obesity is identified as a major changeable risk factor 7 . To identify obesity (i.e., extra body fat accumulation) and the risk of obesity-related complications, several methods such as body mass index (BMI), waist circumference (WC), and waist to hip ratio (WHR) are routinely applied . Although BMI has been widely used to screen overweight and obese individuals, this index cannot predict abdominal obesity (i.e., central obesity). Also, it has different age, sex and ethnic-specific standards, making it less practical for parents and non-professional use 5 . Similarly, WC can reflect fat distribution in the abdominal area, but it may vary based on height, sex and race differences 10 . WHR is another simple index; however, this index cannot change with the increase or decrease in both WC or hip circumference 1 .
This study aimed to investigate the relationship between dietary acidity load and clinical sympto... more This study aimed to investigate the relationship between dietary acidity load and clinical symptoms in the patients with rheumatoid arthritis (RA). This case-control study examined 55 patients with RA and 215 healthy individuals in a Ravansar non-communicable diseases (RaNCDs) cohort study, Iran. Participants' food intakes were assessed using a validated food frequency questionnaire. The dietary acidity was calculated using potential renal acid load (PRAL), net endogenous acid production (NEAP), and dietary acid load (DAL) scores. The patients with RA were identified based on the self-reporting, medications history, and the approval of the cohort center physician following patients' examination. The odds ratio (OR) of joint stiffness in fully adjusted model was greater in the upper median of dietary acidity than in the lower median (PRAL: odds ratio [OR], 1.18; 95% confidence interval [CI], 0.59-2.36), but there was no statistically significant difference. The OR of joint pain in the upper median of dietary acidity was less than in the lower median in fully adjusted model (PRAL: OR, 0.70; 95% CI, 0.46-1.29), but the difference was not statistically significant. After adjusting potential confounders, people in the upper median of dietary acidity had a higher OR of developing RA than those in the lower median (PRAL: OR, 1.39; 95% CI, 0.70-2.76); however, it was not statistically significant. There was not any statistically significant relationship among dietary acidity and the odds of joint pain, joint stiffness, and developing RA.
Background and Aims: Hypertension may lead to disability and death by increasing the risk of card... more Background and Aims: Hypertension may lead to disability and death by increasing the risk of cardiovascular disease, kidney failure, and dementia. This study aimed to determine the association between obesity, sarcopenia and sarcopenic obesity, and hypertension in adults resident in Ravansar, a city in the west of Iran. Methods: This cross-sectional study was conducted on 4,021 subjects from the baseline data of the Ravansar Non-Communicable Disease (RaNCD) cohort study, in the west region of Iran, from October 2014 up to February 2017. Body composition was categorized into obese, sarcopenia, sarcopenic obese, and normal based on measurements of muscle strength, skeletal muscle mass, and waist circumference. Univariate and multiple logistic regression models were used to examine the relationships, using the STATA 15 software. The mean age of the participant was 47.9 years (SD: 8.4), the body mass index (BMI) was 26.84 kg/m 2 (SD: 4.44), and the prevalence of hypertension was 15.12%. The prevalence of obesity, sarcopenia, and sarcopenic obesity were 24.37, 22.01, and 6.91%, respectively. Body composition groups had significant differences in age, total calorie intake, BMI, skeletal muscle mass, and muscle strength (P-value ≤ 0.001). In crude model, the obese (OR = 2.64; 95% CI: 2.11-3.30), sarcopenic (OR = 2.45; 95% CI: 1.94-3.08), and sarcopenic obese (OR = 3.83; 95% CI: 2.81-5.22) groups had a higher odds of hypertension. However, in adjusted models, only the obese group had a higher likelihood of hypertension (OR = 2.18; 95% CI: 1.70-2.80). This study showed that obesity was associated with hypertension, whereas sarcopenia and sarcopenic obesity had no significant relationship with hypertension.
Background: Although obesity increases the risk of hypertension, the effect of obesity based on m... more Background: Although obesity increases the risk of hypertension, the effect of obesity based on metabolic status on the incidence of hypertension is not known. This study aimed to determine the association between obesity phenotypes including metabolically unhealthy obesity (MUO) and metabolically healthy obesity (MHO) and the risk of hypertension incidence. We conducted a prospective cohort study on 6747 adults aged 35-65 from Ravansar non-communicable diseases (RaNCD) study. Obesity was defined as body mass index above 30 kg/m 2 and metabolically unhealthy was considered at least two metabolic disorders based on the International Diabetes Federation criteria. Obesity phenotypes were categorized into four groups including MUO, MHO, metabolically unhealthy non obesity (MUNO), and metabolically healthy non obesity (MHNO). Cox proportional hazards regression models were applied to analyze associations with hypertension incidence. The MHO (HR: 1.37; 95% CI: 1.03-1.86) and MUO phenotypes (HR: 2.44; 95% CI: 1.81-3.29) were associated with higher hypertension risk compared to MHNO. In addition, MUNO phenotype was significantly associated with risk of hypertension incidence (HR: 1.65; 95% CI: 1.29-2.14). Both metabolically healthy and unhealthy obesity increased the risk of hypertension incidence. However, the increase in metabolically unhealthy phenotype was higher.
Background Insulin resistance (IR) and obesity are risk factors for hypertension; triglyceride-gl... more Background Insulin resistance (IR) and obesity are risk factors for hypertension; triglyceride-glucose (TyG) is known as a surrogate for IR. The present study investigated the association between the triglyceride-glucose body mass index (TyG-BMI) index and the risk of hypertension in Iranian adults. This study was conducted on a sample of 8,610 participants from the baseline phase of the Ravansar noncommunicable diseases (RaNCD) in Iran. A logistic regression model was used to evaluate the relationship between TyG-BMI and hypertension. Receiver operating characteristic (ROC) curve analysis was conducted to estimate the predictive power of TyG-BMI for hypertension. Results A total of 4176 men and 4434 women with an average age of 46.74 years were examined. The anthropometric indices were significantly higher in hypertensive than normotensive subjects (P < 0.001). The level of physical activity was significantly higher in the bottom quartiles (P < 0.001). The odds of hypertension in the highest quartile and 3.10 (95% CI: 2.28, 4.16) times significantly higher than the bottom quartile of the TyG-BMI index. The discriminating ability of TyG-BMI to predict blood pressure was 61% (AUC: 0.61; 95% CI: 0.57, 0.63), and higher than BMI and TyG. The TyG-BMI index is associated with an increase in the odds of hypertension. Therefore, the TyG-BMI index can be a new clinical index for early diagnosis of hypertension. Lifestyle modifications such as weight control through physical activity and a healthy diet can help improve IR and prevent hypertension.
High BMI related burden of knee and hip osteoarthritis (OA) is on a significant rise worldwide. O... more High BMI related burden of knee and hip osteoarthritis (OA) is on a significant rise worldwide. OA not only causes joint pain and stiffness, but it also leads to disability. This study investigated the trend and burden of OA attributable to high body mass index (BMI) in Iran. The age-standardized disabilityadjusted life years (DALYs) rates of knee and hip OA due to high BMI, were estimated using data from the Global Burden of Disease 2019. We evaluated DALYs rate trend of high BMI related OA by sex and age in span of 30 years from 1990-2019 across the 31 provinces of Iran. The age-standardized prevalence trend of OA in the knee and hip showed an increase from 1990 to 2019. In 2019 there were 29.92 (95% CI: 10.98-64.92) and 42.50 (95% CI: 16.32-97.37) DALYs/100,000 related to OA from high BMI in men and women, respectively. 2019 saw the greatest DALYs/100,000 rate in the 65-79 age group. From 2005 to 2019, men and women saw DALYs/100,000 rate changes of 24.87 and 17.43 percent, respectively. The burden of knee OA was significantly higher than that of hip OA. DALYs rate of OA due to high BMI was found to be positively associated with the Socio-demographic Index (SDI). The burden of knee and hip OA due to high BMI has increased significantly in recent years in Iran among all age groups of both men and women. It is recommended that health policymakers develop weight control strategies to reduce the burden of OA and implement them at the national level.
Background: Despite evidence supporting the beneficial effects of the Mediterranean diet (MedDiet... more Background: Despite evidence supporting the beneficial effects of the Mediterranean diet (MedDiet) on hepatic steatosis in subjects with non-alcoholic fatty liver disease (NAFLD), the relationship of the MedDiet with hepatic fibrosis is as yet unclear. The aim of the present study was to explore this association in Iranian adults with NAFLD. Methods: This cross-sectional study included 3,325 subjects with NAFLD from the Ravansar Noncommunicable Disease (RaNCD) cohort. Dietary intake data were collected by a validated food frequency questionnaire (FFQ). The MedDiet score was computed based on a nine-point scale constructed by Trichopoulou et al. Fatty liver index (FLI) and fibrosis-4 (FIB-4) index were used to predict hepatic steatosis and fibrosis in the population. Multivariate regression models were applied to determine associations. Results: Subjects in the highest tertile of MedDiet score had a higher platelet and a lower weight, total cholesterol (TC), LDL-c, and FLI than those in the lowest tertile (p-value < 0.05). Adherence to the MedDiet was associated with a 7.48 (95%CI: 5.376 to 9.603; p-value: 0.001) × 10 3 /μl; -0.417 (95%CI: -0.819 to -0.014; p-value: 0.042) kg, -2.505 (95%CI: -3.835 to -1.175; p-value: 0.001) mg/dl; and -1.93 (95%CI: -2.803 to -1.061; p-value: 0.001) mg/dl change in platelet, weight, TC, and LDL-c for each SD increase in the score, respectively. A significant linear trend was observed in odds of hepatic fibrosis across the tertiles of the MedDiet score (P-trend: 0.008). This linear trend was attenuated but remained significant after the adjustment of the relevant confounders (P-trend: 0.032). Adherence to the MedDiet was independently associated with about 16% lower odds of having hepatic fibrosis in patients with NAFLD for each SD increase in the score. Adherence to the MedDiet characterized by a high intake of whole grains, fruits, vegetables, legumes, nuts, and fish was associated with a lower risk of having hepatic fibrosis in patients with NAFLD. Further studies are required to elucidate the causal relationship of observed association in individuals of all ages, ethnicities, and etiologies of hepatic steatosis.
Background: The amount and type of lipids consumed has a great impact on serum lipid pro le and r... more Background: The amount and type of lipids consumed has a great impact on serum lipid pro le and risk of cardiovascular diseases (CVDs). A novel index named atherogenic index of plasma (AIP) is better predictors of CVD risk factors than lipids alone. This study aimed to investigate the effect of edible oils on AIP. Methods: This cross-sectional study conducted on preliminary phase of Ravansar Non-Communicable Disease (RaNCD) cohort study. The amount of consumption of edible lipids was determined based on validated Food Frequency Questionnaire (FFQ). Lipid pro les including triglyceride (TG), and lipoprotein cholesterol (HDL-C) were measured, and AIP was calculated as log10 (TG/HDL-C). Results: A total of 9996 individuals, 4738(47.4%) were male. The mean of AIP was 0.98±0.6 (range from -1.73 to 4.15) that in females (0.97 ± 0.6) was lower than males (1.10 ± 0.6). After controlling for confounding and affecting variables, the AIP index decreased with increasing consumption of a local oil named Kermanshahi oil [β(CI 95% ): -0.006(-0.008, -0.003)], butter[β(CI 95% ): -0.008(-0.011, -0.005)] and not statistically signi cant decrease with Hydrogenated or partial hydrogenated oil [β(CI 95% ): -0.008(-0.001, 0.001)] but the AIP index increased with un-hydrogenated oil [β(CI 95% ): 0.001(-0.001, 0.001)] Conclusion: Kermanshahi oil and butter have decreasing effect on AIP, the effect of margarine was neutral, hydrogenated vegetable oil has trace decreasing effect whereas un-hydrogenated vegetable oil has increasing effect on it. So, consumption of Kermanshahi oil may be associated with lower cardiovascular risk.
Introduction: The aim of this study was to investigate the effect of financial incentives on weig... more Introduction: The aim of this study was to investigate the effect of financial incentives on weight loss, maintain in obese women and biochemical factors. Methods: This quasi-experimental study was conducted on 103 women with body mass index (BMI) ≥ 30 kg/m2. The participants were assessed over a 12-month follow-up in eight phases. Money payment for losing weight was incentive intervention in this study. The participants were given diet and physical activity. Results: Mean of BMI was 34.78 ± 4.29 kg/m2 in baseline, that reduced to 32.41 ± 3.51 kg/m2 in the sixth phase, and 31.64 ± 3.71 kg/m2 in the final phase (P < 0.001). At baseline, mean of percentage of body fat (PBF) was 40.77 ± 2.81 that reduced to 37.34±4.02 at the end of the study (P < 0.001). Waist to hip ratio (WHR) and lean body mass (LBM) decreased significantly over the 12-month (P < 0.001). At the end of each phase, the mean of BMI reduction of 0.39 units was observed in the subjects, and 9 units of change were achieved by the end of the study compared to the baseline. The mean of triglyceride in the first, fourth and seventh phases were 128.57 ± 13.33, 101.43 ± 57.99 and 87.40 ± 57.59 mg/dl, respectively (P = 0.003). The mean of serum glutamic oxaloacetic transaminase (SGOT) and serum glutamate-pyruvate transaminase (SGPT) decreased significantly over the 12-month, P = 0.052 and P = 0.005, respectively. Conclusions: Financial incentives can effectively help to weight loss and maintenance of weight, and improve lipid profiles; blood sugar and liver enzymes. The use of motivational factors with proper training (diet and physical activity) will have a better result.
Introduction: The magnitude and underlying determinants of socioeconomic inequality in dental flo... more Introduction: The magnitude and underlying determinants of socioeconomic inequality in dental flossing are poorly understood in Iran. This study aimed to measure and decompose socioeconomic inequalities in dental flossing in Ravansar, Iran. Methods: Data of 10,002 individuals aged 35-65 years who participated in the Ravansar Non- communicable Diseases (RaNCD) cohort study in Kermanshah province, western Iran, were analyzed. Based on an asset-based method, socioeconomic status (SES) was measured using principal component analysis (PCA). The concentration index and curve were employed to measure socioeconomic inequality in dental flossing. Decomposition analysis was used to estimate the contribution of each determinant to the overall inequality. Results: Of 10,002 participants, 11.74% were found to practice dental floss. The normalized CI for dental flossing was 0.327 in the entire population, 0.323 in females and 0.329 in males, indicating that the use of dental floss is more concentrated among high-SES individuals. The decomposition analysis indicated that SES (50.58%) and level of education (44.90%) respectively contributed the most to this inequality. Place of residence (10.55%) and age group (2.7%) were the next main contributors, respectively. Conclusions: We found a low prevalence of dental flossing among participants in RaNCD study. We also observed a relatively high degree of pro-rich inequality in dental flossing. The observed inequality was mainly explained by socioeconomic status, level of education and place of residence. Policy interventions should consider these factors to reduce inequalities in dental flossing.
Clinical Epidemiology and Global Health, Mar 1, 2020
The purpose of this study was to examine the validity of self-report diabetes according to sociod... more The purpose of this study was to examine the validity of self-report diabetes according to sociodemographic characteristics in participants of Ravansar Non-Communicable Diseases (RaNCD) cohort study. Methods: The study population included 10182 adults (35-65 years old) participating in RaNCD. The 'gold standard' for diagnosis of diabetes mellitus was taken as a history of relevant medicine use and/or measurement of fasting blood glucose indicating diabetes. Self-report data collected before the clinical examinations through interviews by well-trained staff. Sensitivity, specificity, and positive and negative predictive values were used to estimate the accuracy of self-report in diabetes. Results: Of the 10182 individuals invited to participate in the RaNCD, 96 people were not willing to participate in the study (participation rate = 99.06%). The prevalence of diabetes by self-report and gold standard was 10.04% and 8.19% respectively. Among those who said they had diabetes, 389 (38.78%) did not have diabetes. Self-reported diabetes had sensitivity, specificity, positive and negative predictive values of 75.0%, 95.8%, 61.2% and 97.7%, respectively. Being female, aging, smoking, and having a family history of diabetes increased the chance of false positive; and being male, having a family history of diabetes, aging, and increasing BMI increased the chance of false negative. Conclusions: Although the overall validity of self-report in diabetes seems to be acceptable in the study population with a correction factor of 25.3%, it should be noted that the is influenced by age, gender, and family history of diabetes.
A precision instrument is required to assess the nutritional status. This study was conducted on ... more A precision instrument is required to assess the nutritional status. This study was conducted on comparison of 3 nutritional questionnaires to determine energy intake (EI) accuracy in adults in Ravansar Non-Communicable Chronic Disease (RaNCD) cohort study. This cross-sectional study was conducted on 118 of participant's RaNCD. EI was evaluated with 3 questionnaires including food frequency questionnaire (FFQ), 24-hours recall (24HR), and food habits questionnaire (FHQ). Resting metabolic rate (RMR) was measured using indirect calorimetry. We used EI/RMR cut off to evaluate EI reporting status. The mean ± standard deviation of age in men and women were 44.1 ± 6.5 and 43.7 ± 5.25 respectively and 50.8% of participants were men. Among 3 EI estimating questionnaires, FFQ was more accurate than 2 other questionnaires (67.8%). We observed that implausible reporters of 24HR were likely overweight (p < 0.005) but we did not observe a significant difference between EI reporting of FFQ and FHQ with participants' body composition. Our finding showed that EI underreporting of 24HR and FHQ were high. Under reporters were seemed to be overweight. Therefore, these results suggested that among 3 nutritional questionnaires the FFQ was an appropriate approach to determine EI in this population due to plausible EI reporting was higher than 2 other nutritional questionnaires (24HR and FHQ).
Background In recent decades, more and more attention has been paid to the influence of nutrition... more Background In recent decades, more and more attention has been paid to the influence of nutrition on reproductive health. Nevertheless, the imminent association between diet-related inflammation and the risk of infertility has not yet been established. The aim of the current study was to investigate the ability of the Dietary Inflammatory Index (DII) to estimate infertility incidence in women. Methods This cross-sectional study was conducted using data from Ravansar non-communicable diseases (RaNCD) cohort study on 4437 participants. The DII was calculated based on the reported consumption of up to 31 food parameters measured via a validated and reproducible 118-item food-frequency questionnaire (FFQ). Multiple logistic regression analysis was applied to estimate the multivariable odds ratio (OR) adjusted for potential confounding variables. Out of all participants, 411 women (9.26%) were infertile. The mean ± SD age and weight of infertile women were 43.67 ± 7.47 years and 72.86 ± 13.02 kg, respectively. Statistical analyses showed the odds ratio of infertility in the fourth quartile (pro-inflammatory diet) was 1.76 times higher than in the first quartile (anti-inflammatory diet) of DII (95% CI: 1.57-2.02). The findings of this study provide compelling evidence about the association between infertility and the quality of diet in women. Therefore, interventions and programs aimed at promoting a healthy lifestyle and using healthy diets can be considered as one of the effective approaches in the prevention and treatment of infertility in women.
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