Role of Climate Change in Urologic Health: Kidney Stone Disease.

Kidney stones are rising in incidence and prevalence worldwide. Given the temperature dependence of kidney stone presentations, climate change is projected to further increase the burden of disease for individuals and society. PATIENT SUMMARY: This mini-review reports current knowledge on climate change in relation to kidney stone disease. Kidney stones are more common in patients living in parts of the world that are hotter and more humid. Kidney stone problems are also more common after periods of high heat, which have a greater impact on men than on women. As temperatures rise with climate change, it is likely that the occurrence of kidney stones and the costs associated with their diagnosis and treatment will increase as well.

Financial toxicity in prostate cancer survivors: A national cross-sectional assessment of subjective financial burden.

BACKGROUND: In prostate cancer (CaP) survivorship, subjective financial burden (SFB), an aspect of financial toxicity, has not been studied using a national sample. Our goal was to explore and identify factors associated with patient-reported SFB in CaP survivors. MATERIALS AND METHODS: We conducted a retrospective, cross-sectional study of 264 adult individuals with a history of CaP that completed the AHRQ - Medical Expenditures Panel Survey - Household Component and Cancer Self-Administered Questionnaire Supplement in 2016 or 2017. Primary outcomes were the presence of cancer-related SFB and the severity of this burden. Multivariable ordinal logistic regression and logistic regression models were used to identify factors associated with the severity of SFB and different domains of burden. RESULTS: Most participants were non-Hispanic white, had 3 or more comorbidities and had a median age of 72 years. 62.1% of survivors indicated SFB associated with their CaP care and long-term effects. 49.2% of CaP survivors indicated coping SFB, 27.7% psychological, and 29.2% material. Older (OR: 0.95, 95%CI 0.92-0.98) was associated with less SFB. Low-income level (OR: 2.1, 95%CI 1.01-4.36) was associated with higher SFB. Hispanic survivors (OR: 2.8 95%CI 1.1-7.4) indicated more psychologic SFB. Presence of a caregiver was noted as a predictor of material (OR 2.6, 95%CI 1.45-4.49) and psychological (OR: 2.2, 95%CI 1.13-3.91) SFB. CONCLUSIONS: Many CaP survivors experience SFB and associated factors differ in domain of financial burden. This provides evidence and groundwork for understanding financial burden and improving the quality of counseling and care for this population.

Ecological Momentary Assessment of Factors Associated with Water Intake among Adolescents with Kidney Stone Disease.

PURPOSE: Maintaining high water intake decreases kidney stone recurrence but is difficult to do. Strategies to reduce stone recurrence among adolescents are lacking. We conducted an ecological momentary assessment study to identify factors associated with water intake in adolescents with nephrolithiasis. MATERIALS AND METHODS: The study population consisted of 15 female and 10 male patients 12 to 18 years old with at least 1 prior kidney stone. For 7 days participants used "smart" bottles to self-monitor water intake and received questionnaires randomly 4 times daily, which were completed in real time on mobile devices. The questionnaires ascertained awareness of water intake volume, awareness of water intake goals, perceived need to drink, access to water, alternative beverage consumption and attitudes toward bathrooms. Linear mixed effects models were fit to estimate the association between momentary responses and daily water intake. RESULTS: During 175 person-days 595 assessments (85%) were completed. Median daily water intake was 1,304 ml (IQR 848-1,832) and 20% of participants met their intake goal for 4 days or more. Unawareness of water intake volume was associated with drinking 690 ml less water per day (p = 0.04). A strong self-perceived need to drink more was associated with drinking 1,954 ml less water each day compared to no self-perceived need to drink more (p <0.01). Unawareness of intake goals was weakly associated with drinking 1,129 ml less water each day (p = 0.1). Access to water, alternative beverage consumption and bathroom aversion were not associated with water intake. CONCLUSIONS: Unawareness of water volume consumed and low responsiveness to perceived need to drink more were associated with low water intake. Interventions that help adolescents recognize when and identify how to increase water intake may be effective in decreasing stone recurrence.

Assessment of the combination of temperature and relative humidity on kidney stone presentations.

Temperature and relative humidity have opposing effects on evaporative water loss, the likely mediator of the temperature-dependence of nephrolithiasis. However, prior studies considered only dry-bulb temperatures when estimating the temperature-dependence of nephrolithiasis. We used distributed lag non-linear models and repeated 10-fold cross-validation to determine the daily temperature metric and corresponding adjustment for relative humidity that most accurately predicted kidney stone presentations during hot and cold periods in South Carolina from 1997 to 2015. We examined three metrics for wet-bulb temperatures and heat index, both of which measure the combination of temperature and humidity, and for dry-bulb temperatures: (1) daytime mean temperature; (2) 24-h mean temperature; and (3) most extreme 24-h temperature. For models using dry-bulb temperatures, we considered four treatments of relative humidity. Among 188,531 patients who presented with kidney stones, 24-h wet bulb temperature best predicted kidney stone presentation during summer. Mean cross-validated residuals were generally lower in summer for wet-bulb temperatures and heat index than the corresponding dry-bulb temperature metric, regardless of type of adjustment for relative humidity. Those dry-bulb models that additionally adjusted for relative humidity had higher mean residuals than other temperature metrics. The relative risk of kidney stone presentations at the 99th percentile of each temperature metric compared to the respective median temperature in summer months differed by temperature metric and relative humidity adjustment, and ranged from an excess risk of 8-14%. All metrics performed similarly in winter. The combination of temperature and relative humidity determine the risk of kidney stone presentations, particularly during periods of high heat and humidity. These results suggest that metrics that measure moist heat stress should be used to estimate the temperature-dependence of kidney stone presentations, but that the particular metric is relatively unimportant.