Higher Prevalence Of Hyperuricemia Research Articles

A national study exploring the association between triglyceride-glucose index and risk of hyperuricemia events in adults with hypertension

BackgroundThe triglyceride-glucose (TyG) index has been recommended as a practical surrogate of insulin resistance (IR). However, the association between the TyG index and hyperuricemia among adults with hypertension remains to be elucidated. MethodsWe included and analyzed 3134 HTN patients and 4233 non-HTN participants from the cross-sectional 2013–2018 U.S. National Health and Nutrition Examination Surveys (NHANES). Multivariable logistic regression and restricted cubic splines (RCS) were used to explore the association between the TyG index and hyperuricemia. Stratifed analyses were performed to assess the association in populations with different subgroups of hypertension. ResultsThe prevalence of hyperuricemia was higher in HTN patients (28.00 %) than in non-HTN participants (12.47 %). The multivariable logistic regression showed that the TyG index was significantly associated with hyperuricemia. After multivariable adjustment, higher TyG index levels were found to be associated with a higher prevalence of hyperuricemia in HTN patients (OR: 2.39, 95 % CI: 1.37–4.17, Ptrend < 0.001) and non-HTN participants (OR: 2.61, 95 % CI: 1.45–4.69, Ptrend < 0.001). Restricted cubic spline regression showed linearity of the associations between the TyG index and hyperuricemia (p-nonlinear > 0.05). In the subgroup analysis suggested that the positive association seemed to be strong among male, alcohol use, and diabetes group (P for interaction < 0.05). ConclusionsTyG index, a practical surrogate of IR, was linearly and positively associated with hyperuricemia in HTN and non-HTN participants. Proactive measures are needed to prevent the comorbidity of IR-driven hyperuricemia in the future.

Comorbid pathology in patients with hyperuricemia in the Khabarovsk region

BACKGROUND: Uric acid can affect many metabolic processes in the human body. In recent decades, great importance has been given to increased levels of uric acid — hyperuricemia. Hyperuricemia has been proven to be an independent risk factor for the development of cardiovascular, renal and metabolic diseases, and not just their marker, as had previously ben considered. AIM: To determine the incidence of hyperuricemia at the primary outpatient stage, as well as to assess the prevalence of comorbid pathology among patients with hyperuricemia in the Khabarovsk Territory. MATERIALS AND METHODS: We analyzed 5261 medical records of the patients who applied for an initial outpatient appointment at the Clinical Diagnostic Center and the Viveya Consultative and Diagnostic Center in Khabarovsk from November 2022 to November 2023. From the total number of medical records 2428 patients had elevated level of uric acid in the blood. RESULTS: Arterial hypertension (60.5%) was the most common pathology; obesity – the second (27.35%); diabetes mellitus type 2 was less common in the patients with hyperuricemia (17.75%), and nephrolithiasis was the least common pathology (7.91%). CONCLUSIONS: A high prevalence of hyperuricemia among the population of the Khabarovsk Territory was revealed. Elevated levels of uric acid affect the development of comorbid pathology in the patients, in particular cardiovascular pathology. The results obtained during the study indicate a high prevalence of comorbid diseases in hyperuricemia with arterial hypertension being the most frequent.

Prevalence of Hyperuricemia and Associated Cardiovascular Risk Factors in Elite Athletes Practicing Different Sporting Disciplines: A Cross-Sectional Study.

Uricemia has been identified as an independent risk factor for cardiovascular disease. In the general population, hyperuricemia is associated with hypertension, endothelial dysfunction, and other cardiovascular risk (CVR) factors. Our aim was to explore the prevalence of hyperuricemia among Olympic athletes, evaluating the influence of sporting discipline and its correlation with CVR factors. We enrolled 1173 Olympic athletes classified into four disciplines: power, skill, endurance, and mixed. Clinical, anthropometric data, and complete blood test results were collected. Hyperuricemia was present in 4.4% of athletes, 0.3% were hypertensive, 11.7% had high-normal blood pressure values, 0.2% were diabetic, 1.2%. glucose intolerance, 8.2% active smokers, and 3% were obese. Males had a higher prevalence of hyperuricemia (5.3%) than females (3.4%) with no significant differences between different sporting disciplines (male, p = 0.412; female p = 0.561). Males with fat mass >22% presented higher uricemia (5.8 ± 1 vs. 5.3 ± 1 mg/dL, p = 0.010) like hypertensive athletes (6.5 ± 0.3 vs. 5.3 ± 1 mg/dL, p = 0.031), those with high-normal blood pressure (5.13 ± 1 vs. 4.76 ± 1.1 mg/dL, p = 0.0004) and those with glucose intolerance (6 ± 0.8 vs. 5.3 ± 1 mg/dL, p = 0.066). The study provides a comprehensive evaluation of hyperuricemia among Olympic athletes, revealing a modest prevalence, lower than in the general population. However, aggregation of multiple CVR factors could synergistically elevate the risk profile, even in a population assumed to be at low risk. Therefore, uric acid levels should be monitored as part of the CVR assessment in athletes.

Hyperuricemia And Its Relation With Obesity Among Children In Anbar Province

Background; The prevalence of pediatric hyperuricemia is increasing worldwide. No other similar study was done in Anbar province previously. Objective: This study was designed to show the prevalence of hyperuricemia among children from 6 to 16 years old in Ramadi teaching hospital for maternity and childhood, Anbar province, Iraq. Studying the relation of hyperuricemia with childhood obesity, in addition to its relation with gender, residency, and economic status of their families. Material and Methods: Across sectional study was done for 6 months from the first of January 2021 to the end of June 2021, to determine the expected prevalence of hyperuricemia among a randomized sample of children of ages from 6-16 years with either gender. Weight and height were measured for all cases, a body mass index was calculated for each child for estimation of obesity. For all studied cases, other data was collected for socioeconomic status and residency. All cases were sent for serological calculation of uric acid levels. Results: The total number of studied children was 520, the overall prevalence of hyperuricemia among these cases was (11.3%). The overweight's and obese children had a higher prevalence of hyperuricemia (29.3 %) compared with only (3.3%) among those who were not. Girls had more prevalence than boys with female to male ratio (2.2:1). Most of the cases were from middle-economic status families with a non-significant relation when compared with control, while it was more and significant among urban area residence. Conclusions: A higher prevalence of hyperuricemia was found among obese children in Anbar province, and this requires a specific educational program given to the families in explaining the risk and how to deal with obesity.

Cardiometabolic Risk Factors in Mexican Adults With Congenital Heart Disease

BackgroundIn recent decades, adults living with congenital heart disease (ACHD) have improved their survival, thus increasing their predisposition to the onset of cardiometabolic risk factors and chronic health conditions. ObjectivesThe purpose of this study was to describe cardiometabolic risk profiles in the ACHD population and their relationship to congenital heart disease (CHD) lesion complexity. MethodsWe performed a cross-sectional study from ACHD in a third-tier referral center in Mexico City. The association between cardiometabolic risk factors and CHD complexity was estimated using logistic regression models. ResultsOur study cohort included 1,171 ACHD patients (median age: 31 [IQR: 23.2-42.7] years, male 63.6%). Cardiac diagnosis was classified as mild (44.9%), moderate (37.8%), and severe (17.2%) CHD complexity. Low high-density lipoprotein cholesterol (55%) was the most common cardiometabolic risk factor; followed by insulin resistance (54.5%) and prediabetes (52.4%). Patients with mild and moderate CHD had a higher prevalence of obesity and metabolic syndrome, while patients with severe CHD had a higher prevalence of hyperuricemia and subclinical hypothyroidism. In the logistic regression analysis, the severity of CHD was associated with higher odds of hyperuricemia (moderate CHD, OR: 1.87; 95% CI: 1.20-2.93; P = 0.010; severe CHD, OR: 2.75; 95% CI: 1.64-4.62; P < 0.001) and lower risks of metabolic syndrome (OR: 0.61; 95% CI: 0.41-0.91; P = 0.010), prediabetes (OR: 0.58; 95% CI: 0.42-0.81; P < 0.001), and arterial hypertension (OR: 0.49; 95% CI: 0.33-0.74; P < 0.001) compared with mild CHD complexity. ConclusionsWe observed high rates of cardiometabolic risk factors in Mexican ACHD patients and these risk profiles varied by CHD lesion complexity. These results highlight the need for ongoing metabolic health surveillance in the ACHD population.

Association between uric acid and risk of venous thromboembolism in East Asian populations: a cohort and Mendelian randomization study

Serum uric acid (SUA) levels have been associated with an increased risk and recurrence of venous thromboembolism (VTE) in European populations, but the potential causal relationship remains unclear. Large-scale studies on the association between SUA and VTE in East Asian populations are lacking, despite the high prevalence of hyperuricemia in this region. To address this, we conducted a cohort analysis and a two-sample Mendelian randomization (MR) study in East Asian populations. We collected data on VTE patients from the China Pulmonary Thromboembolism Registry Study (CURES) and compared them to controls obtained from the China Health and Retirement Longitudinal Survey (CHARLS). Propensity score matching (PSM) and cubic-spline models were applied to assess the effect of SUA on VTE risk while adjusting for multiple covariates. We also performed two-sample MR analyses to infer potential causality based on summary statistics from Genome-wide Association Studies (GWAS) of SUA and VTE in the East Asian population. We found that the SUA levels were higher in VTE patients (317.95mmol/L) compared to the general population (295.75mmol/L), and SUA ≥ 325mmol/L was associated with an increased risk of VTE recurrence (P-value=0.0001). The univariable MR suggested a causal relationship between elevated SUA and higher VTE risk (Pinverse variance weighted < 0.05), and multivariable MR showed that elevated SUA levels continued to promote the development of VTE after adjusting for multiple covariates (Pmultivariable residual < 0.05). Sensitivity analyses produced similar results for these estimations. Our study provides evidence supporting a robust positive association between SUA and VTE in the East Asian population, and MR analyses suggest that this association is likely to be causal. Our findings underscore the importance of monitoring SUA levels in VTE prevention and call for urgent action to address the growing burden of hyperuricemia in the Asia-Pacific region. This research was funded by Beijing Nova Program (No. Z211100002121057), National Natural Science Foundation of China (No. 82100065 and No. 62350004), CAMS Innovation Fund for Medical Sciences (No. 2021-I2M-1-061 and No. 2021-1-I2M-001), Elite Medical Professionals project of China-Japan Friendship Hospital (No. ZRJY2021-QM12), National Key Research and Development Project (No. 2021YFF1201200 and No. 2022YFC3341004).

A 5-Year Follow-Up Study to Explore Factors Associated with Rapid Kidney Function Decline Among Bus Drivers.

Owing to the stressful occupational characteristics, bus drivers have been reported to have a higher risk of renal dysfunction. However, the related factors associated with rapid kidney function decline among bus drivers have not been explored in the existing literature. Therefore, our research aimed to investigate factors related with rapid kidney function decline, and to explore the correlation of baseline SUA (serum uric acid), longitudinal changes in SUA, and rapid eGFR (estimated glomerular filtration rate) decline for bus drivers. This was a five-year cohort study in Shenzhen, China, between 2017 and 2021. We included 832 bus drivers with normal kidney function at baseline. Study subjects were stratified into four quartiles of change in eGFR, and rapid eGFR decline was regarded as the highest (4th) quartile of ΔeGFR (eGFR in 2017-eGFR in 2021). Univariable and multivariable logistic regressions were conducted to explore factors affecting rapid eGFR decline. The incidence of hyperuricemia among bus drivers was 37.7% in 2017 and 40.5% in 2021. The overall subjects had a median 5-year decrease in eGFR of 6.72 mL/min/1.73 m2, and individuals with increased SUA from normal to hyperuricemia group had the greatest decline of eGFR. Multivariate analysis showed bus drivers' age (Odds radio: OR, 1.04), elevated baseline eGFR (OR, 1.08), and SUA increase (OR, 1.38) were significantly associated with rapid eGFR changes. The high prevalence of hyperuricemia among bus drivers should warrant more attention from health professionals. Subjects' age, elevated baseline eGFR, and SUA increase were risk factors for rapid eGFR decline over 5-year. The findings can provide significant evidence for timely prevention and intervention to decrease the incidence of rapid renal function decline among bus drivers.

High prevalence of hyperuricemia and the association with metabolic syndrome in the rural areas of Southwestern China: A structural equation modeling based on the Zhuang minority cohort

Background and aimsThe prevalence of hyperuricemia (HUA) and metabolic syndrome (MetS) in the Zhuang minority had not been examined. We aimed to determine the prevalence of HUA and MetS, and explore the interrelationship among the serum uric acid to creatinine (SUA/Cr) ratio, MetS, and its components. Methods and resultsA cross-sectional study was conducted with structured questionnaire and physical examination based on the Zhuang minority cohort. A Structural Equation Model was performed to examine the hypothesis link between the SUA/Cr ratio, MetS, and its components. 10,902 aged 35–74 years Zhuang minority adults were included. The total prevalence of HUA and MetS was 17.5% and 23.7%, respectively. The SUA/Cr ratio had a positive effect on MetS (the standardized coefficient βr was 0.311 in males and 0.401 in females). The SUA/Cr ratio was positively associated with obesity (βr = 0.215), dyslipidemia (βr = 0.177), and high blood pressure (βr = 0.034) in males and was positively associated with obesity (βr = 0.303), dyslipidemia (βr = 0.162), and hyperglycemia (βr = 0.036) in females. ConclusionsThe prevalence of HUA in the aged 35–74 years Zhuang minority adults was high while the prevalence of MetS was relatively low. As HUA is an earlier-onset metabolic disorder and the SUA/Cr ratio had a positive effect on MetS and its components, the prevention measures of MetS should be strengthened. And the SUA/Cr ratio can be used as an early warning sign to implement the intervention measures of MetS.

Distribution of serum uric acid concentration and its association with lipid profiles: a single-center retrospective study in children aged 3 to 12 years with adenoid and tonsillar hypertrophy

BackgroundPresently, there is no consensus regarding the optimal serum uric acid (SUA) concentration for pediatric patients. Adenoid and tonsillar hypertrophy is considered to be closely associated with pediatric metabolic syndrome and cardiovascular risk and is a common condition in children admitted to the hospital. Therefore, we aimed to evaluate the relationship between SUA and dyslipidemia and propose a reference range for SUA concentration that is associated with a healthy lipid profile in hospitalized children with adenoid and tonsillar hypertrophy.MethodsPreoperative data from 4922 children admitted for elective adenoidectomy and/or tonsillectomy surgery due to adenoid and tonsillar hypertrophy were collected. SUA concentrations were scaled to standard deviation (SD), and SUA deviations were expressed as SD from the mean SUA of children without dyslipidemia.ResultsThe mean SUA concentration of the participants was 4.27 ± 1.01 mg/dL, and the prevalence of hyperuricemia was 1.6% when it was defined using an SUA of ≥ 7.0 mg/dL. Participants with dyslipidemia (856, 17.4%) had a higher prevalence of hyperuricemia (3.4% vs. 1.2%, P < 0.001) and higher SUA concentrations (4.51 ± 1.15 vs. 4.22 ± 0.97 mg/dL, P < 0.001) than those with ortholiposis. The circulating lipid status of participants with SUAs < 1 SD below the mean value for the participants with ortholiposis (range 1.80–3.28 mg/dL) was more normal. Each 1-SD increase in SUA was associated with a 27% increase in the risk of dyslipidemia (OR = 1.270, 95% CI, 1.185–1.361). Adjustment for a number of potential confounders reduced the strength of the relationship, but this remained significant (OR = 1.125, 95% CI, 1.042–1.215). The higher risk of dyslipidemia was maintained for participants with SUAs > 1 SD above the mean value of the participants with ortholiposis.ConclusionsSUA was independently associated with dyslipidemia in children with adenoid and tonsillar hypertrophy, and an SUA < 1 SD below the mean value for patients with ortholiposis was associated with a healthy lipid profile.

Ethanolic Extract from Limonia acidissima L. Fruit Attenuates Serum Uric Acid Level via URAT1 in Potassium Oxonate-Induced Hyperuricemic Rats.

A high prevalence of hyperuricemia among adult and older adult populations has intrigued the development of its therapy based on natural products. Our objective was to investigate the antihyperuricemic activity of the natural product from Limonia acidissima L. in vivo. The extract was obtained through the maceration of L. acidissima fruits using an ethanolic solvent and was tested for its antihyperuricemic activity against potassium oxonate-induced hyperuricemic rats. Serum uric acid, creatinine, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and blood urea nitrogen (BUN) were observed before and after the treatment. Expression of urate transporter 1 (URAT1) was also measured using a quantitative polymerase chain reaction. Antioxidant activity based on a 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assay, along with total phenolic content (TPC) and total flavonoid content (TFC), were measured. Herein, we present the evidence of the serum uric acid lowering effect of the L. acidissima fruit extract along with improved AST and ALT (p < 0.01). The reduction of serum uric acid was in accordance with the decreasing trend of URAT1 (1.02 ± 0.05-fold change in the 200 mg group), except in a group treated with 400 mg/kg body weight extract. At the same time, BUN increased significantly in the 400 mg group (from 17.60 ± 3.286 to 22.80 ± 3.564 mg/dL, p = 0.007), suggesting the renal toxicity of the concentration. The IC50 for DPPH inhibition was 0.14 ± 0.02 mg/L with TPC and TFC of 143.9 ± 5.24 mg GAE/g extract and 390.2 ± 3.66 mg QE/g extract, respectively. Further studies should be carried out to prove this correlation along with the safe concentration range of the extract.

High Prevalence of Hyperuricemia and Associated Factors among Zhuang Adults: A Cross-Sectional Study Based on the Ethnic Minority Population Cohort in the Southwestern China

The highest prevalence of hyperuricemia was found in Zhuang minority adults in two national surveys in China, with only 1% Zhuang study subjects. However, the prevalence of hyperuricemia and the associated factors in Zhuang adults have not been well-addressed. A cross-sectional study was conducted to explore the prevalence of hyperuricemia and the common comorbidities, and the associated factors in Zhuang adults based on the Guangxi Ethnic Minority Population Cohort. Among 11,175 Zhuang adults aged 35-74 years, the age- and sex-standardized prevalence rate was 18.1% for hyperuricemia and 1.1% for gout. The standardized prevalence rate and awareness rate were 31.6% and 32.3%, respectively, for hypertension, and were 5.1% and 48.2%, respectively, for diabetes. High education level, history of coronary heart disease (CHD), hypertension, being a current drinker, high body mass index (BMI), central obesity, hyper-triglyceride (hyper-TG), hyper-total cholesterol (hyper-TC), hypo-high density lipoprotein cholesterol (hypo-HDL-C), and abnormal aspartate aminotransferase (AST) were risk factors, while smoking and diabetes were protective factors of hyperuricemia in males. Older age, being single/divorced, having a high education level, hypertension, drinking tea, high BMI, central obesity, hyper-TG, hyper-TC, hypo-HDL-C, and abnormal alanine aminotransferase (ALT) were risk factors in females. The high prevalence of hyperuricemia but low prevalence of gout and common comorbidities in Zhuang adults may be due to a lag effect of lifestyle changes. Health education and health management should be strengthened to prevent the progression of comorbidities, considering the lag effect and low awareness rate.

Prevalence of Chronic Kidney Disease After Heart Transplant: A Single Center Experience

Chronic kidney disease (CKD) is a long-term complication after nonkidney solid-organ transplant. The incidence of CKD after heart transplant (HT) ranges between 10% and 80%. With the intention of knowing the prevalence of CKD among patients who have received an HT in our center, as well as the risks factors associated with this complication, we analyzed sociodemographic and laboratory variables, comorbidity, and kidney function of 165 HT recipients between 1986 and 2021 and currently under follow-up in our hospital. We found that 127 of the patients had a CKD Epidemiology Collaboration estimated glomerular filtration rate (eGFR) <90 mL/min/1.73 m 2 : 56 patients (33.9%) with CKD stage 2 (eGFR 90-60 mL/min/1.73 m 2 ), 59 (35.8%) with CKD stage 3 (eGFR 59-30 mL/min/1.73 m 2 ) and 16 (9.7%) with GFR <30 mL/min/1.73 m 2 (CKD stage 4-5). Patients with CKD stage 3 were older, with a mean (SD) age of 60.1 (13.9) years ( P = .005), and there was a nonsignificant trend toward a higher proportion of diabetes mellitus (42.4%, P = .059) and a higher prevalence of hyperuricemia (37.3%, P = .008) with respect to the CKD stage 2 group. We found no differences between groups in terms of the prevalence of hypertension, immunosuppressive treatment, or the time elapsed since the transplant. In conclusion, in the analysis of our population of patients with an HT, 3 of 4 have impaired kidney function and more than half have moderate-advanced CKD. Classic risk factors are not different between patients with CKD stage 2 and those with CKD stage 3.

Hyperuricemia: an unrecognized risk factor for kidney-related sequelae in children with hemolytic uremic syndrome.

Chronic kidney-related sequelae after STEC-HUS occur in 20-40% of patients. Hyperuricemia (HU) may cause acute and chronic toxicity involving the kidneys. We retrospectively assessed if there was an association between the presence of HU during the acute illness and that of kidney-related sequelae in children with STEC-HUS. Children with STEC-HUS who had clinical and laboratory data at 2years of follow-up were included in this case-control study. Univariate and multivariate analyses were performed between patients with (cases) or without (controls) kidney-related sequelae to identify factors associated with outcomes, including different measures of serum uric acid (sUA) (baseline level, peak, and duration of HU). HU was defined as sUA > 8mg/dL. Of 86 patients included, 77.9% had HU. Patients with sequelae (n = 41) had a higher prevalence of HU (41/41 vs. 26/45, p < 0.01), higher baseline leukocyte count, serum creatinine (sCr), and sUA levels as well as lower sodium than controls. During hospitalization, cases also had higher sCr peak, sUA peak and duration of HU, requirement and duration of dialysis, extrarenal complications, and hypertension. By multivariate analysis, after adjusting for length of dialysis, only duration of HU (p = 0.0005; OR 1.7, 95% CI 1.27-2.36) remained as an independent predictor of sequelae, with a best cutoff of 5.5days (AUC 0.95, specificity 80%, sensitivity 100%). The presence of HU is a common finding in children with STEC-HUS and its duration during the acute stage was associated with kidney-related sequelae, regardless of the duration of dialysis. A higher resolution version of the Graphical abstract is available as Supplementary Information.

The prevalence of asymptomatic hyperuricemia in patients with chronic kidney disease and its effect on the course and prognosis (experience of one center)

Objective: to analyze the prevalence of asymptomatic hyperuricemia (HU), as well as to assess its relationship with metabolic disorders, pathological conditions and complications in chronic kidney disease (CKD), we conducted a retrospective cohort study in the form of a total cross-section of patients hospitalized in a round-the-clock bed of the nephrology department. Material and methods: 261 patients were included in the study, the average age was 50.9±17.2 (M±SD), there were 261 males and 99 females. The structure of CKD in hospitalized patients was as follows: CKD C1 — 53 patients, C2 — 70 patients, C3A — 46, C3B — 46, C4 — 36, C5 — 7 patients. The study did not include patients diagnosed with gout. Results: the uric acid level in the examined cohort was 369.8±109.7 mmol/L, ranging from 157 to 768 mmol/l. As the glomerular filtration rate (GFR) decreased, the probability of HU increased. With the development and progression of dyslipidemia, there was an increase in the probability of detecting HU. In patients with CKD, an increase in the level of daily proteinuria was also accompanied by an increase in the probability of detecting HU. The risk of progression of CKD to the terminal stages, as well as LVH, arrhythmias, hypertension is associated with high values of uric acid in the blood. Conclusions: the high prevalence of HU in patients with CKD, along with data on its negative impact on the course of CKD, is an important argument in favor of its detection and control. The association of HU with metabolic disorders against the background of high proteinuria explains one of the mechanisms of its detrimental effect on the course of CKD. The influence of HU on the probability of detection of hypertension, LVH, arrhythmias and terminal stages of CKD is shown, which determines the importance of the modifiability of this risk factor in the prognosis of the course of CKD

Hyperuricemia: Features of the Diet

The association of hyperuricemia (HU) with cardiovascular disease (CVD), diabetes, metabolic syndrome, and kidney disease has been demonstrated in numerous studies. НU is the main pathogenetic factor in the development of gout and is associated with an increase in overall and cardiovascular mortality. НU is included in the list of factors determining cardiovascular risk. According to epidemiological studies, there is a high prevalence of HU in the world and its increase in recent decades. A number of factors have been identified that contribute to the increased risk of НU. Non-modifiable factors include gender, age, genetic factors, and modifiable factors include diet and lifestyle. Nutritional unbalances, increased life expectancy, increased prevalence of obesity, and increased use of drugs (especially diuretics) are seen as contributing factors to the rise in НU. The review was carried out to summarize the available information on the effect of dietary habits, individual foods and nutrients on serum uric acid (SUA) levels and the risk of developing HU. The review presents the results of scientific studies demonstrating the relationship of НU with the consumption of foods rich in purines (offal, red meat, fish, seafood, legumes), alcohol consumption, drinks sweetened with fructose, coffee, dairy products, vegetables and fruits. Diet correction is an important and necessary step in the prevention and treatment of НU. The article reviews the basic principles of dietary management in HU and provides dietary recommendations for patients. For effective prevention and treatment of НU, a mandatory correction of the diet is required.

Association of hyperuricemia with risk of incident chronic kidney disease in adult in Songjiang district, Shanghai: a follow-up study

Objective: To evaluate the association of hyperuricemia with the risk for chronic kidney disease (CKD) in community adults. Methods: A community-based follow-up study comprising of 7 276 adults aged 20-74 years who attended the natural population cohort in Eastern China and had no CKD at baseline survey was performed in the Songjiang district, Shanghai. CKD was diagnosed according to the National Kidney Foundation Practice Guidelines for Chronic Kidney Disease criteria. Hyperuricemia was defined as serum uric acid level >420 μmol/L for men and >360 μmol/L for women. Cox proportional hazards model was used to examine the association of hyperuricemia with the risk for CKD. Results: During a median follow-up period of 2.65 year, 301 participants were newly diagnosed with CKD. The cumulative incidence rate and incidence density of CKD were 4.14%, and 16.01/1 000 person-years (95%CI: 14.20-17.82), respectively. A higher prevalence of hyperuricemia was observed in subjects with CKD compared with those without CKD. Multivariate Cox regression model analysis showed that hyperuricemia was associated with the increased risk for CKD, with an adjusted HR of 1.92 (95%CI: 1.46-2.53). Their positive associations remained in almost all the subgroups, including sex, age (<60, ≥60 years), BMI (<25.0, ≥25.0 kg/m2), type 2 diabetes, and hypertension. A significant synergistic effect of the interaction between age and hyperuricemia on CKD was found, and the synergy index was 1.78 (95%CI: 1.18-2.68). Conclusion: The incidence of CKD in adults in Songjiang district was relatively high. Hyperuricemia is an independent risk factor for the development of CKD.

A retrospective cross-sectional study of the associated factors of hyperuricemia in patients with chronic kidney disease

ObjectiveTo investigate the prevalence of hyperuricemia in patients at different stages of chronic kidney disease (CKD) and the association of serum uric acid (SUA) with several clinical factors in a retrospective cross-sectional study of non-dialysis CKD patients at two hospitals in Shanghai, China.MethodsThe prevalence of hyperuricemia in CKD patients and the association of SUA with other clinical factors were examined using analysis of variance, chi-squared test, multivariate analysis, and other statistical methods.ResultsA total of 663 CKD patients were enrolled, of which approximately 52% had hyperuricemia. CKD patients with hyperuricemia had lower hemoglobin and estimated glomerular filtration rate (eGFR) levels but higher blood urea nitrogen, serum creatinine, and serum phosphate levels than those without hyperuricemia. Serum uric acid level was positively associated with age, blood urea nitrogen , serum creatinine, cystatin C, and serum phosphate and negatively associated with hemoglobin and eGFR. In addition, CKD patients with anemia and hyperphosphatemia had a higher prevalence of hyperuricemia than those without anemia or hyperphosphatemia.ConclusionsThe prevalence of hyperuricemia increased with CKD progression supporting the use of urate-lowering treatment for patients with CKD stage 1 to 4.

Associations of serum iron and ferritin with hyperuricemia and serum uric acid.

To assess the serum iron and ferritin levels in relation to the prevalence of hyperuricemia (HU) and the serum uric acid (SUA) level. Serum iron and ferritin concentrations were detected by Ferene method and chemiluminescence method, respectively. SUA level was detected by uricase-PAP method. HU was defined as SUA ≥ 416μmol/L for male and ≥ 357μmol/L for female. Multivariable-adjusted logistic regressions were constructed to investigate the associations between serum iron/ferritin levels and prevalence of HU. Pearson correlation analysis and multivariable linear regression were performed to examine the correlations between serum iron/ferritin levels and SUA level. A total of 2824 subjects (mean age 52.2 ± 7.2) were included. The overall prevalence of HU was 17.3%. Compared with the lowest quartile, the multivariable-adjusted odds ratios (OR) and its 95% confidence interval (CI) of HU were 1.33 (95%CI 0.97-1.82), 1.17 (95%CI 0.85-1.60), and 1.56 (95%CI 1.14-2.13) in the second, third, and fourth quartiles of serum iron, respectively (P for trend = 0.012), and were 1.29 (95%CI 0.89-1.88) in the second, 2.13 (95%CI 1.47-3.07) in the third, and 2.25 (95%CI 1.54-3.29) in the fourth quartile of serum ferritin (P for trend < 0.001). Pearson correlation coefficient indicated a weak positive correlation between serum iron (r = 0.2, P < 0.001) and ferritin (r = 0.3, P < 0.001) levels and SUA. Such positive correlations were further confirmed by multiple linear regression (serum iron: standardized β = 0.059, P < 0.001; serum ferritin: standardized β = 0.061, P = 0.001). Both serum iron and ferritin showed a positive correlation with the prevalence of HU, and a weak positive correlation with SUA level. Key Points • Subjects with higher levels of serum iron or ferritin had higher prevalence of HU. • There was a weak positive correlation between serum iron/ferritin levels and SUA level.

Hyperuricemia is associated with androgenetic alopecia in men: A cross-sectional case-control study.

Early androgenetic alopecia (AGA) is patterned hair loss occurring before 30years. Early AGA is frequently reported in men and carries the risk of obesity, metabolic syndrome, and cardiovascular diseases. Hyperuricemia used to be a minor component of metabolic syndrome. Recently, increasing number of studies has proved that hyperuricemia is an independent risk factor for many cardiovascular diseases and psoriasis. However, none of these studies have examined the relationship between hyperuricemia and AGA. To determine the association between hyperuricemia and AGA in men. A cross-sectional case-control study was conducted. The medical charts and photographs of men with a clinical diagnosis of AGA were reviewed. The clinical and laboratory data of AGA and control groups were compared. Men with AGA (n=1312) had higher mean uric acid level (6.25mg/dL vs 5.97mg/dL; P<.001) and higher prevalence of hyperuricemia (25.0% vs 15.6%; P<.001) than those without AGA (n=2624). There was no statistically significant association between AGA severity and hyperuricemia (P=.295). Men with early AGA have a higher prevalence of hyperuricemia.

Dietary and nutritional factors associated with hyperuricemia: The seventh Korean National Health and Nutrition Examination Survey.

The association of dietary and nutritional factors with hyperuricemia and gout is well-known in Western populations. The present study aimed to examine the association of dietary and nutritional factors with hyperuricemia among Korean adults. This cross-sectional study included 10,175 participants from the seventh Korean National Health and Nutrition Examination Survey 2016-2017. Dietary information was collected using a single 24-hour recall method, and nutritional information was derived from the 9th Korean Food Composition Table. The associations between serum uric acid and intake of meat, seafoods, nuts, and legumes, sugar-sweetened products, dairy products, alcohol, sodium, vitamin A, vitamin B1, vitamin C, and dietary fiber were analyzed using linear regression analysis adjusting for confounding variables. The association with hyperuricemia was analyzed using logistic regression analysis. All analyses were weighted by the sampling design. Alcohol intake was associated with serum uric acid in both men and women. In men, the highest quartile of alcohol intake was associated with a 1.5-times higher prevalence of hyperuricemia (odds ratio [OR] 1.5, 95% confidence interval [CI] 1.16-1.95), while vitamin C and dietary fiber intakes were found to be inversely associated with hyperuricemia. For vitamin C and dietary fiber intake, the ORs for a quartile increase were 0.93 (95% CI 0.86-0.99) and 0.92 (95% CI 0.85-0.99), respectively. The associations between vitamin C, dietary fiber and alcohol intakes and hyperuricemia in men support the Dietary Approach to Stop Hypertension (DASH)-based approach and attention to alcohol intake for managing hyperuricemia in Korean men.