Prevalence Of Stones Research Articles

The protective role of cardiovascular health against kidney stones: A study based on LE8 score

ObjectivesThe American Heart Association recently released an updated algorithm for evaluating cardiovascular health (CVH)-Life's Essential 8 (LE8) score. Our objective was to investigate the correlation between levels of CVH, as determined by the LE8 score, and the risk of kidney stones among a representative sample of adults in the United States. MethodsWe included data from the National Health and Nutrition Examination Survey (NHANES) covering the years 2007–2016 for further analysis. The LE8 score, a comprehensive measurement ranging from 0 to 100, was used to evaluate overall CVH and classified into three categories: low (0–49), moderate (50–79), and high (80–100) CVH. Logistic regression was employed to assess the association between the LE8 score and kidney stones. Furthermore, sensitivity analysis was conducted to validate the findings, and the presence of a non-linear relationship was examined using restricted cubic spline (RCS) regression methods. ResultsA total of 19,988 participants were included in this study (weighted mean age, 47.99 years; 95 % confidence interval [CI]: 47.46–48.53 years), with 10,319 being female (weighted percentage, 51.98 %; 95 % CI: 51.26–52.71 %) and 1923 identified as having kidney stones (weighted percentage, 9.95 %; 95 % CI: 9.41–10.53 %). In the fully-adjusted multivariable model, higher LE8 scores were associated with prevalence of self-reported kidney stones (odds ratio [OR] for a 10-unit increase in score, 0.86; 95 % CI: 0.82–0.91), presenting a linear dose-response relationship. Compared to the low CVH group, participants in the moderate and high CVH groups exhibited a lower prevalence of kidney stones (OR = 0.80; 95 % CI: 0.69–0.92; OR = 0.54; 95 % CI: 0.43–0.69, respectively). Similar trends were observed when assessing the association between health behavior scores and kidney stones. Moreover, the negative correlation between the LE8 score and the prevalence of kidney stones was markedly more pronounced in various stratified analyses. ConclusionOur study suggests that a higher level of CVH, as assessed by the LE8 metrics, is independently associated with a lower prevalence of self-reported kidney stones in a linear relationship. Further research, particularly through longitudinal or intervention studies, is required to establish whether actively promoting optimal CVH levels can effectively reduce the incidence of kidney stones.

Assessment of Urinary Stone Chemical Compositions and Prevalence of Metabolic Disorders Among Urolithiasis Patients in Northern Sri Lanka: A Prospective Study.

Introduction Urolithiasis, a common urological disorder affecting the global population, demonstrates geographical diversity due to factors such as water quality, climate variations, health conditions, and dietary habits. This study, conducted in Northern Sri Lanka, examines urinary stone compositions and assesses the prevalence of metabolic disorders among urolithiasis patients. Methods This prospective cross-sectional study, conducted at Jaffna Teaching Hospital, Jaffna, Sri Lanka, from July 2022 to June 2023, focused on surgically treated urolithiasis patients. Institutional ethical clearance was obtained. Patient details and investigational findings were collected through questionnaires and data extraction forms. Stone analysis utilized Fourier transform infrared spectroscopy, and a detailed metabolic evaluation of a 24-hour urine collection sample was carried out. Results This study followed 153 surgically treated urolithiasis patients, primarily male (64.3%), with a mean age of 48.64. Ureteric colic (48.4%) was common, with kidney stones (45.8%) prevalent; 57.52% had recurrent stones. Diabetes mellitus (DM; 23.5%) was the top comorbidity. Calcium oxalate monohydrate (COM) stones (78.4%) were the most frequent, followed by uric acid (12.4%). COM predominated in the 40-59 age group. There was no significant gender-stone type association. A total of 86.9% had metabolic abnormalities, notably hypocitraturia (60.1%). Moreover, 23% had both hypocitraturia and hypomagnesuria. Some metabolic disorders showed gender differences, with a marginal age-metabolic disorder association (p < 0.061). Urine oxalate levels were normal, with higher variability in males. Conclusion Middle-aged males with urolithiasis commonly presented with ureteric colic and predominantly had COM stones. Recurrent stones were common, often accompanied by metabolic abnormalities such as hypocitraturia and hypomagnesuria, with DM as the primary comorbidity.

Association between daily sitting time and kidney stones based on the National Health and Nutrition Examination Survey (NHANES) 2007-2016: a cross-sectional study.

Kidney stones are among the most common urological conditions affecting ~9% of the world population. Although some unhealthy diets and unhealthy lifestyles are reportedly risk factors for kidney stone, the association between daily sitting time and kidney stone has not been explored. This large-scale, cross-sectional study was conducted using data from the National Health and Nutrition Examination Survey (NHANES) database 2007-2016. Kidney stone history and daily sitting time were retrieved from the questionnaire and 24hour (h) recall interviews. Logistic regression and subgroup analysis were conducted to investigate the association. The analysis was further stratified by vigorous recreational activity. A total of 19188 participants aged ≥20 years with complete information were included in this study. The overall prevalence of kidney stone was 9.6%. Among participants without vigorous recreational activity, a trend towards an increasing prevalence of kidney stone was observed with increased daily sitting time. However, the trend was not observed in individuals who participated in vigorous recreational activity, as they experienced a decreased risk of kidney stone despite having a daily sitting time of 6-8h (crude model OR=0.659, 95% CI: 0.457-0.950, P =0.028), indicating that vigorous recreational activity may partially attenuate the detrimental effect of prolonged sitting time. Our study revealed an increasing trend of prevalence of kidney stone with increased daily sitting time among the population not performing vigorous recreational activity despite the difference was nonsignificant. Vigorous recreational activity may modify the association between daily sitting time and kidney stone. More prospective cohort studies are warranted to further examine this association.

Global Trends in Kidney Stone Awareness: A Time Series Analysis from 2004-2023.

Despite the prevalence and incidence of kidney stones progressively increasing worldwide, public awareness of this condition remains unclear. Understanding trends of awareness can assist healthcare professionals and policymakers in planning and implementing targeted health interventions. This study investigated online search interest in "kidney stone" by analyzing Google Trends, focusing on stationarity of the trends and predicting future trends. We performed time series analysis on worldwide Google monthly search data from January 2004 to November 2023. The Augmented Dickey-Fuller (ADF) test was used to assess the stationarity of the data, with a p-value below 0.05 indicating stationarity. Time series forecasting was performed using the autoregressive integrated moving average to predict future trends. The highest search interest for "kidney stone" (score 100) was in August 2022, while the lowest was in December 2007 (score 36). As of November 2023, search interest remained high, at 92. The ADF test was significant (p = 0.023), confirming data stationarity. The time series forecasting projected continued high public interest, likely reflecting ongoing concern and awareness. Notably, diverse regions such as Iran, the Philippines, Ecuador, the United States, and Nepal showed significant interest, suggesting widespread awareness of nephrolithiasis. This study highlighted that "kidney stone" is a consistently relevant health issue globally. The increase and stationarity of search trends, the forecasted sustained interest, and diverse regional interest emphasize the need for collaborative research and educational initiatives. This study's analysis serves as a valuable tool for shaping future healthcare policies and research directions in addressing nephrolithiasis related health challenges.

Association between kidney stones and poor sleep factors in U.S. adults.

The purpose of our study is to examine the correlation between sleep factors and the prevalence of kidney stones in US adults. A total of 34,679 participants from the National Health and Nutrition Examination Survey 2007 to 2018 were included in the analyses. Sleep data collection included: presleep factors (difficulty falling asleep, sleep onset latency), intra-sleep factors (risk index of obstructive sleep apnea, restless leg syndrome, difficulty maintaining sleep), post-sleep factors (daytime sleepiness, non-restorative sleep), sleep schedule and duration, and sleep quality. Logistic regression models were used to analyze the correlation between sleep factors and the prevalence of kidney stones. Among the 34,679 participants, the overall incidence of kidney stones was 9.3%. The presence of presleep factors (difficulty falling asleep [odds ratios [OR], 1.680; 95% CI, 1.310-2.150], prolonged sleep onset latency [OR, 1.320; 95% CI, 1.020-1.700]), intra-sleep factors (higher risk index of obstructive sleep apnea [OR, 1.750; 95% CI, 1.500-2.050], restless leg syndrome [OR, 1.520; 95% CI, 1.150-1.990], difficulty maintaining sleep [OR, 1.430; 95% CI, 1.130-1.810]), post-sleep factors (daytime sleepiness [OR, 1.430; 95% CI, 1.220-1.680], non-restorative sleep [OR, 1.400; 95% CI, 1.110-1.760]), short sleep duration (OR, 1.190; 95% CI, 1.080-1.310), mediate sleep quality (OR, 1.140; 95% CI, 1.020-1.290), and poor sleep quality (OR, 1.500; 95% CI, 1.310-1.720) are linked to the occurrence of kidney stones. However, short sleep onset latency, bedtime and wake-up time were not significantly associated with the prevalence of kidney stones. These findings showed positive associations between higher kidney stone prevalence and poor sleep factors.

PREVALENCE OF URINARY TRACT STONES IN PATIENTS WITH BENIGN PROSTATIC HYPERPLASIA (BPH) UNDERGOING TRANS URETHRAL RESECTION OF THE PROSTATE (TURP) OPERATION

Objective: This study aims to determine the prevalence of urinary tract stones in BPH patients undergoing TURP surgery. Material &amp; Methods: This research is a descriptive study using secondary data with medical records of BPH patients who underwent TURP at Saiful Anwar General Hospital (RSSA) for the period of 2018 – 2022. Results: From the results of the 169 patient samples BPH undergoing TURP, there were 35 samples, who experienced urinary tract stones. The most frequent incidence of urinary tract stones in patients with BPH at the age of 60 – 70 years of 15 samples (42.90 %), with the highest prostate volume being &gt;50 mL, there are 15 samples (42.90 %), and the location of the most urinary tract stone were in the lower urinary tract with the bladder stone type being 30 samples (85.7%). Conclusion: From the results, it can be concluded that the prevalence of urinary tract stones in BPH patients undergoing TURP surgery is 20.7%, which is an absolute indication for TURP. Keywords: Benign prostatic hyperplasia, urinary tract stone, age, prostate volume.

Proton pump inhibitors use is associated with a higher prevalence of kidney stones: NHANES 2007–2018

BackgroundProton pump inhibitors (PPIs) are widely used throughout the world as an effective gastrointestinal drug. Nevertheless, according to the existing literature, PPIs can reduce the excretion of magnesium, calcium and other components in urine, which may promote the formation of kidney stones. We used the National Health and Nutrition Examination Survey (NHANES) database to further investigate the association between the use of PPIs and the prevalence of kidney stones.MethodsWe performed a cross-sectional analysis using data from 2007 to 2018 NHANES. PPIs use information of 29,910 participants was obtained by using prescription medications in the preceding month, and kidney stones were presented by a standard questionnaire. Multiple regression analysis and stratified analysis were used to estimate the association between PPIs use and kidney stones after an adjustment for potential confounders.ResultsThe multiple logistic regression indicated that the PPIs exposure group (P1) had a significantly higher risk of nephrolithiasis than the PPIs non-exposure group (P0) in Model 3 (OR 1.24, 95% CI 1.10–1.39, P < 0.001). The stratified analyses indicated there were significant statistical differences between PPIs use and kidney stones among females (OR 1.36, 95% CI 1.15–1.62, P < 0.001), non-Hispanic whites (OR 1.27, 95% CI 1.09–1.48, P = 0.002), individuals with an education level than 11th grade (OR 1.41, 95% CI 1.13–1.76, P = 0.002) and individuals with an annual family income of $0 to $19,999 (OR 1.32, 95% CI 1.06–1.65, P = 0.014) and $20,000 to $44,999 (OR 1.25, 95% CI 1.02–1.54, P = 0.033) in Model 3.ConclusionsOur study revealed that PPIs use is associated with a higher prevalence of kidney stones for the US population, primarily among women, non-Hispanic whites, individuals with low education levels and individuals with low household income levels. Further studies are required to confirm our findings.

Cholesterol plus dietary tannins play a key role in formation of urinary stone

The incidence of urolithiasis has been rising worldwide for several decades, but the main aetiological factors remain unknown. It was found that the prevalence of urolithiasis was correlated with intakes of high fat plus fruits rich in tannins through questionnaire-based dietary consumption surveys and epidemiological analysis. Cholesterol and polyphenols were also found in various renal stones of human. Cholesterol could co-precipitate with polyphenols extracted from various food materials in vitro, particularly condensed tannins. Therefore, prepared tannins from fruit were isolated by gel filtration column and characterized by high performance liquid chromatography. Mice gavaged with apple tannins and cholesterol caused remarkable cholesterol/tannins deposits, glomerular atrophy as well as increasing urine proteins, creatinine and electrolytes. Mice gavaged with ethylene glycol, tannins and cholesterol showed stronger nephrotoxicity, caused urine solute supersaturation in renal tubules, less urine and more deposits in urinary system, forming bladder stones (41.6% morbidity). Molecular dynamics simulation suggested that tannins and cholesterol formed complexes through van der Waals forces and hydrogen bonds. These findings indicated that interaction of cholesterol and tannins is a key factor in the formation of urinary stones, providing a clear explanation of urolithiasis formation. This study should help to design the strategies for prevention and control of various urinary stones as well as reveal the crucial reason for the increasing prevalence of urinary stones.

Relationship Between Body Mass Index and Blood Lipids with Kidney Stone Disease: The Fasa Adults Cohort Study

Background: Urinary stones rank as the third most common disease of the genitourinary system, following urinary tract infections and prostate diseases. Their incidence is influenced by various demographic, environmental, and genetic factors. Objectives: This study aimed to explore the association between Body Mass Index (BMI), blood lipids, and kidney stones. Methods: This cross-sectional study utilized the baseline data of 10 133 participants aged 35 - 70 years from the Fasa cohort study. The dataset included demographic information, biochemical laboratory results, anthropometric measurements, behavioral data, and the presence or absence of kidney stones. Data analysis employed t-tests, chi-square tests, and logistic regression models. Results: Among the 10 133 participants, 54.9% were women, with a mean age of 48.63 ± 9.57 years. The prevalence of kidney stones was 17.3%. The findings indicated a correlation between BMI and triglyceride levels (TG) with kidney stones. Elevated BMI and triglyceride levels were associated with increased odds of developing kidney stones, with odds ratios of 1.048 (95% CI: 1.025 - 1.048) and 1.006 (95% CI: 1.001 - 1.006), respectively. Conclusions: The study revealed a significant relationship between BMI, triglyceride levels, and kidney stones. Individuals with kidney stones exhibited higher mean BMI and TG levels compared to those without. These findings from the Fasa PERSIAN (Prospective Epidemiological Research Studies in Iran) cohort suggest that kidney stone disease is linked to elevated triglyceride levels and BMI. Given that a high-fat diet contributes to increased BMI and elevated serum triglyceride levels, measures to reduce weight, combat obesity, and manage triglyceride levels are warranted to mitigate the risk of kidney stone formation.

Association between body roundness index and prevalence of kidney stone in the U.S: a study based on the NHANES database

ObjectiveThis study aimed to evaluate the potential association between the body roundness index (BRI) and kidney stone prevalence in adults in the United States.MethodsA cohort of participants from the National Health and Nutrition Examination Survey (NHANES) database spanning 2007–2018 were gathered for analysis. Logistic regression analyses, subgroup assessments, and calculations were employed to examine the potential link between BRI and kidney stone prevalence.ResultsThe study included 30,990 participants aged > 20 years, of which 2,891 declared a kidney stone history. After modulating all relevant confounding factors, each unit increase in the BRI was linked to a 65% increase in kidney stone prevalence (OR = 1.65, 95% CI: 1.47, 1.85). Sensitivity analyses conducted by categorizing the BRI into three groups revealed a 59% increase in kidney stone prevalence in the highest tertile BRI group compared to the lowest one (OR = 1.59, 95% CI: 1.42, 1.79). Furthermore, dose-response curves depicted a positive near-linear correlation between the BRI and the risk of kidney stone prevalence.ConclusionThese findings suggest a clinically noteworthy positive correlation between higher BRI values and kidney stone prevalence among the studied US adult population. However, it is essential to acknowledge that the observed relationship does not establish a causal link.

High Self-Reported Prevalence of Kidney Stones in Trinidad and Tobago: Results of a Cross-Sectional Online Survey.

Introduction No data exist on the prevalence of kidney stone disease in Trinidad and Tobago. Local clinicians have noted that the disease is very common,and this study represents the first attempt to investigate the prevalence of urolithiasis in these islands. Objectives The objective is to estimate the prevalence of kidney stone disease in Trinidad and Tobago and to investigate the epidemiology of the disease. Methods An online survey using the online tool Survey Monkey was distributed among members of the public via instant messaging and social media. The survey captured data relating to the stone status and demographics of respondents. Results 1225 patients completed the survey of whom 46.5% were males and 53.5% were females. Respondents were equally distributed throughout the country. 16.74% of those surveyed indicated that they were currently affected by stones confirmed by imaging. Kidney stones were more common among Trinidadians of East Indian ancestry (20.6% vs 10.6%). Positive correlations were established between kidney stones and the presence of hypertension, diabetes, and gout. Persons with kidney stones were more likely to have a family member with the disease - 45.6% vs 31.4% among those without kidney stones. Conclusion This study demonstrates a high self-reported prevalence of kidney stones in Trinidad and Tobago.

Kidney stones and dietary intake in adults: a population-based study in southwest Iran

BackgroundThe prevalence of kidney stones is on the rise globally. Several risk factors, including lifestyle, contribute to the formation of kidney stones. Nevertheless, there is a contentious debate about the relationship between diet and kidney stones. Therefore, our study aimed to assess the relationship between macronutrients and micronutrients and the formation of kidney stones.MethodsThis population-based cross-sectional study was conducted in the baseline phase of the Hoveyzeh Cohort Study, focusing on adults aged 35–70 in southwest Iran. The information on demographic characteristics, anthropometrics, kidney stone history, and food frequency was collected. Chi-square and t-tests were utilized to assess the relationship between categorical and numerical variables with kidney stones. The ANCOVA and logistic regression models were used to evaluate the relationships while controlling for confounding factors.ResultsAmong 10,009 participants, the overall prevalence of kidney stones was 18.77% (95% CI: 17.99–19.53). A higher intake of carbohydrates [OR = 1.02 (95% CI:1.002–1.03), p = 0.026] and copper [OR = 1.04 (95% CI:1.01–1.09), p = 0.025] were found to be associated with kidney stones. No associations were found between the other assessed macronutrients or micronutrients and kidney stones (p-tvalues > 0.05).ConclusionOur study’s findings indicate a correlation between diet and the formation of kidney stones. However, the relationship between dietary factors and kidney stones is complex, and further research is needed.

Multivitamins co-intake can reduce the prevalence of kidney stones: a large-scale cross-sectional study.

This research aimed to explore the association between changes in the intake of common individual vitamins and combinations of vitamins and the prevalence of kidney calculi. We used data from NHANES to investigate the association between nine common vitamins and kidney stone prevalence. Participants were clustered into several vitamin exposure patterns using an unsupervised K-means clustering method. We used logistic regression models and restrictive cubic spline curves to explore the influence of vitamins. The regression model exposed that compared to lower intake, high intake of vitamin B6 [Q4: OR (95% CI) = 0.76 (0.62, 0.93)], vitamin C [Q4: OR (95% CI) = 0.73 (0.59, 0.90)] and vitamin D [Q4: OR (95% CI) = 0.77 (0.64, 0.94)] individually exerted protective effects against the prevalence of kidney stones. Furthermore, the restrictive cubic spline analysis showed that the protective effect against the prevalence of kidney stones is enhanced as the take of vitamin B6 and vitamin D increased. Moreover, with the increase in vitamin C intake, its protective effect may turn into a risk factor. Regarding mixedexposure, Cluster 4 exhibited a significant protective effect against kidney stones compared with Cluster 1 [Model 3: OR (95% CI) = 0.79 (0.64, 0.98)]. Our research revealed that high levels of vitamin B6 and vitamin D intake were linked to a lower prevalence of kidney stone. With the gradual increase intake of vitamin C, the prevalence of kidney calculi decreased first and then increased. In addition, the co-exposure of nine vitamins is a protective factor for kidney stone disease.

Association Between Physical Activity and the Prevalence of Kidney Stones in American Adults: Results From a Multiyear National Survey

ObjectiveTo investigate the association between physical activity and the prevalence of kidney stones. MethodsA cross-section study was conducted using data from National Health and Nutrition Examination Survey 2007-2018. Physical activity was evaluated based on the Global Physical Activity Questionnaire. Multivariable logistic regression was performed to elucidate the association between physical activity (patterns, intensity, duration and frequency of moderate and vigorous physical activity) and the prevalence of kidney stones after adjusting for potential confounders. Stratified and interaction analyses were conducted to detect potential effect modifiers. In addition, physical activity was assessed using metabolic equivalent and physical volume, and followed the regression above. Water intake was obtained from the day 2 dietary recall and was included in the sensitivity analysis. ResultsA total of 34,390 participants were included in the analysis. The multivariable logistic regression revealed that individuals who engaged in moderate physical activity for 30-60 minutes per day had a significant inverse association with the prevalence of kidney stones in the fully-adjusted model (OR=0.804, 95%CI 0.700 to 0.923), while no more significant finding was observed for other physical activity parameters. Interaction and stratified analyses indicated no covariate modifying the association. The results above were robust in the sensitivity analysis. ConclusionThe duration of moderate physical activity (30-60 mins/day) is inversely associated with the prevalence of kidney stones, while no more significant association was observed between other physical activity parameters (including patterns, intensity, duration and frequency of vigorous physical activity, frequency of moderate physical activity) and kidney stones. Data availabilityData available in a publicly accessible repository that does not issue DOIs. Publicly available datasets were analyzed in this study. These data can be found here: https://www.cdc.gov/nchs/nhanes/index.htm.

Current aspects of surgical methods for removal of bladder stones in patients with bladder outlet obstruction

The prevalence of bladder stones is quite high, which represents a significant medical and social problem. Despite significant progress in the field of medicine, there are currently no generally accepted standards for the treatment of patients with cystolithiasis. This review presents an analysis of literature sources using the PubMed, Google Scholar, Scopus, eLibrary, Cyberleninka databases, dedicated to modern aspects of the treatment of patients with bladder stones and bladder outlet obstruction. The features, advantages and disadvantages of various surgical methods for treating such patients are described in detail. It has been shown that despite the fact that transurethral cystolithotripsy with litholapaxy is the most common surgical option, modern medicine offers alternative methods of surgical treatment. It is emphasized that to achieve the greatest effectiveness of treatment, the correct choice of surgical method is necessary, based on the individual characteristics of the patient. It was noted that there is a need to optimize the treatment algorithm for patients with bladder stones and bladder outlet obstruction.

Association between DCP levels and kidney stone prevalence in US female adults based on NHANES data

Our study aimed to evaluate the correlation between levels of 2,4-DCP(2,4-Dichlorophenol) and 2,5-DCP(2,5-Dichlorophenol) and the prevalence of kidney stones in US female adults. Participants were chosen from the National Health and Nutrition Examination Survey database, spanning the years 2007–2016. Dose–response curves were analyzed using logistic regression, subgroup analyses, and other statistical methods to evaluate the relationship between 2,4-DCP and 2,5-DCP levels and the prevalence of kidney stones. The final study included 3220 participants aged over 20 years, with 252 females reporting a history of kidney stones. After accounting for all interfering variables, we found that every 0.1 ug/ml increase in 2.4-DCP correlated with a 1% rise in kidney stone prevalence (OR = 1.01, 95% CI 1.00, 1.01), whereas the same increase in 2.5-DCP was linked to a 27% growth in prevalence (OR = 1.27, 95% CI 1.01, 1.61). Sensitivity analysis was performed by triangulating 2,4-DCP and 2,5-DCP levels. The dose–response curves demonstrated a linear positive relationship between 2,4-DCP and 2,5-DCP levels and the risk of stone development. Our findings indicate a positive correlation between 2,4-DCP and 2,5-DCP levels and the prevalence of kidney stones in US female adults. This association is of clinical significance; however, a direct causal relationship cannot be definitively established.

Determinants of Partial Stone Clearance after Mini-PCNL in the Pediatric Population

Abstract: Background: The prevalence of renal stones in pediatric population is increasing in Pakistan, to minimize the adverse outcomes of renal stone disease accurate diagnosis and proper management is necessary. Objective: This study aim to evaluate the risk factors of partial stone clearance after mini-PCNL in the pediatric population of Pakistan. Materials and Methods: This is a retrospective, cross-sectional study conducted at Godhra Hospital, Karachi, during 2021, patients diagnosed with single or multiple renal stones requiring PCNL were enrolled in the study, Guy’s stone score was used as a prediction method for complete clearance. SPSS version 22 was used to analyze the data, chi-square test was used to assess the significance of the data keeping a p-value ≤0.05 as significant. The risk estimation was analyzed with the help of the odds ratio test. Result: A total of 234 participants with mean age of 6.4 ± 4.8 years were enrolled. Stone clearance was reported 203 (86.7%) and 31 (13.2%) residual fragments. 09 (3.8%) out of the residual stone group needed intervention for complete clearance while the remaining were reported as stone free after 4 weeks with METs. The mean residual stone size was 0.7 ± 0.3, upon assessing the determinants maximum patients had Staghorn (&gt; 4) cms stone size with 7 (2.9%) of patients out of 13 (5.5%). The odds of having partial clearance were reportedly positive with 2.34 in staghorn ≥ 4cms stone size and 1.62 in Grade IV Guy’s stone score. Conclusion: Stone size ≥ 4.0 cm and staghorn calculi present in all calyces are independent risk factors for partial stone clearance after Mini-PCNL.

Urinary tract infection after flexible ureterorenoscopy for urolithiasis in patients with positive treated preoperative urinalysis.

Prevalence of kidney stones is increasing worldwide, flexible ureterorenoscopy (f-URS) is the most common surgical treatment. Postoperative urinary tract infection (PUTI) is the primary complication. Some risk factors are classically associated with PUTI, especially preoperative positive urinalysis (POPU). We aimed to identify risk factors for PUTI after f-URS for urolithiasis in patients with treated POPU, and to identify the different pre and postoperative pathogens. Retrospective, single-center study of all f-URS for urolithiasis between January 2004 and December 2020. Procedures with treated POPU were categorized as PUTI or no PUTI (NPUTI). We examined demographics, preoperative, perioperative and postoperative characteristics in each group. Among 1934 procedures analyzed, 401 (20.7%) had POPU; these were categorized into NPUTI (n = 352, 87.8%) and PUTI (n = 49, 12.2%). By univariate analysis, only preoperative stenting duration (76.3 in NPUTI group vs 107.7days in PUTI group, p = 0.001) was significantly associated with a higher risk of PUTI in univariate analysis. Germ distribution was similar in both groups. We compared pre- and postoperative microbiological data for interventions with PUTI, and found that only 8.7% of pathogens were identical between pre and postoperative urinalysis. Our study shows that the rate of PUTI is higher for patients with a POPU and that preoperative stent duration is the sole risk factor in patients with POPU. The low concordance rate (8.7%) between POPU and post-operative pathogens highlights the need for further research on obtaining sterile preoperative urinalysis, or performing intraoperative culture (urines, stent or stone), to treat PUTI early with an adapted antibiotic therapy.

The Prevalence of Nephrolithiasis and Associated Risk Factors Among the Population of the Riyadh Province, Saudi Arabia.

Background and objective Kidney stones, also referred to as nephrolithiasis or renal calculi, is a condition where crystal depositions are formed within the kidney and ideally excreted from the body via the urethra with no pain; however, larger calculi may cause significant pain and require further medical assistance. The vast majority of patients who develop renal calculi form calcium stones, which are either a composition of calcium oxalate or calcium phosphate. Other types include uric acid, struvite, and cysteine. While kidney stones are one of the most significant diseases among the Saudi population, which require an acute emergency intervention to prevent serious long-term complications,there are limited studies published regarding this condition inSaudi communities. In light of this, we performed this study to assess the prevalence, incidence, and risk factors of kidney stones among the population of Riyadh, Saudi Arabia. Methods This was a cross-sectional studyconducted in Riyadh, Saudi Arabia between Augustand October 2023, aiming to estimate the prevalence and risk factors of nephrolithiasis among residents of the Riyadh province. Data were collected through an electronic questionnairein both Arabic and Englishand distributed via social media in addition to barcode handouts in various selected venues in Riyadh. The questionnaire involved 12 questions categorized into three sections. The first section obtained demographical information while the second sectioncollected data about the past medical history of the participants. Lastly, the third section aimedto assess the prevalence of nephrolithiasis among participants or any history of the condition among their families. Results Atotal of 1,043 participants were surveyed, of whom 533 were males (51.1%). The prevalence of kidney stones was reported in 98 individuals (9.4%) overall. Individuals in the age groups of 36-50, 51-60, and >60 years showed significantly more renal stone prevalence than those in younger age groups (p<0.001). The prevalencewas found to be higher in participants who were smokers, diabetic, hypertensive, and those who suffered from inflammatory bowel disease (IBD), gout, chronic kidney disease (CKD), hyperthyroidism, and hyperparathyroidism. Participants who took calcium supplements or had a positive family history of renal stones were found to have a higher prevalence of renal stones as well. However, only hypertension, gout, and family history showed any statistical significance (p<0.05). Conclusions A direct correlation was observed between hypertension, gout, positive family history, and aging and an increased prevalence of kidney stones among theinhabitants of the Riyadh province. Therefore, we encourage the local authorities to raise awareness of kidney stones and their related risk factors among the general public. Moreover, further local studies need to be conducted to gain deeper insights into kidney stone prevalence, especially pertaining to associated comorbiditiesand the pattern of the disease itself.

Reply to Editorial Comment: Prevalence, Incidence, and Determinants of Kidney Stones in a Nationally Representative Sample of US Adults

Reply to Editorial Comment: Prevalence, Incidence, and Determinants of Kidney Stones in a Nationally Representative Sample of US Adults