Faculty Bibliography

OBJECTIVE:In people with chronic kidney disease (CKD), hyperphosphatemia is a risk factor for mortality. Though unproven, dietary phosphorus control is considered essential in CKD. Although dietary and serum phosphorus are correlated, phosphorus from plant foods rich in phytate is less bioavailable than from animal and processed foods. Yogurt, valued for its low phosphorus and high protein, may be detrimental in CKD due to animal protein content. Plant-based yogurts (PBYs) might offer similar benefits without the downsides of animal protein, but little is known about their phosphorus content. DESIGN AND METHODS/METHODS:Protein contents and phosphorus additives were gathered from nutrition labels of several PBYs, including almond, cashew, oat, coconut, and soy substrates. Phosphorus content was measured via emission spectrometry by Eurofins (Madison, WI), and the phosphorus-to-protein ratio (PPR) was calculated for each PBY. RESULTS:Phosphorus content was highest in Silk Soy Strawberry, Silk Almond Strawberry, and Siggi's Coconut Mixed Berries, while it was lowest in So Delicious Coconut Strawberry, Oatly Oat Strawberry, Forager Cashew Strawberry, and Kite Hill Almond Strawberry. Ingredient labels revealed that Silk Soy Strawberry, Silk Almond Strawberry, and Oatly Oat Strawberry contained phosphorus additives, and Siggi's Coconut Mixed Berries contained pea protein additives. Though from the same substrate class, So Delicious Coconut Strawberry and Siggi's Coconut Mixed Berries showed significant differences in phosphorus and protein contents. All seven PBYs had higher PPR ratios than dairy yogurts like Stonyfield Organic Oikos Strawberry, Chobani Nonfat Strawberry, and Yoplait Greek Strawberry. CONCLUSION/CONCLUSIONS:Low-PPR foods are important for CKD patients. Siggi's Coconut Mixed Berries had the lowest PPR, making it potentially the most desirable for CKD patients. However, there is high variability in PPR among PBYs with the same substrate; therefore, Delicious Coconut Strawberry had the highest PPR, highlighting the importance of product selection for patients with CKD.

BACKGROUND:Prostate cancer (PCa) diagnosis and treatment can have a significant negative impact on sexual health, affecting patients and their partners; however, the impact on partners is insufficiently addressed in current practice. OBJECTIVE:We describe the development and validation of an instrument to measure sexual health in female partners of patients with PCa. DESIGN, SETTING, AND PARTICIPANTS/METHODS:Questions assessing sexual health were developed through a literature review, two qualitative studies, and an expert consensus process. Candidate survey items were tested through cognitive interviews and used to iteratively refine the questionnaire. INTERVENTION/METHODS:The final questionnaire was tested in a validation study among 200 female partners. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS/METHODS:We performed an exploratory factor analysis, followed by an analysis for internal validity, test-retest reliability, and convergent and discriminant validity. RESULTS AND LIMITATIONS/CONCLUSIONS:An initial set of 32 items was developed and refined through cognitive interviews. The resulting 27-item questionnaire was tested among 200 female partners of patients with PCa from across the USA. The exploratory factor analysis eliminated eight items and revealed seven key factors: (1) distress/satisfaction, (2) loss of connection as a couple, (3) active communication, (4) discomfort with communication, (5) frustration with sexual counseling, (6) expansion of sexual repertoire, and (7) nonpenetrative sexual activity. The overall scale demonstrated strong internal consistency (ordinal alpha 0.94) and test-retest reliability (0.89). Strengths of the study include development and evaluation of the first questionnaire to evaluate sexual quality of life among female partners of patients with PCa. However, additional work is needed to assess sexual health and quality of life among male and nonbinary partners. CONCLUSIONS:We developed a new instrument, the Sexual Concerns In Partners of Patients with Prostate cancer (SCIPPP-F), and found it to be valid in a diverse sample of female partners across the USA. PATIENT SUMMARY/RESULTS:Our new instrument can be used to characterize sexual health among female partners of patients with prostate cancer.

Plant-based diets have grown in popularity owing to multiple health and environmental benefits. Some evidence suggests that plant-based diets are associated with benefits for urological health. In genitourinary oncology, most research has focused on prostate cancer. Clinical trial results suggest a favourable influence of healthy lifestyle modifications including plant-based diets before and after prostate cancer treatment. Epidemiological evidence shows that a diet higher in plant-based and lower in animal-based food is associated with a lower risk of aggressive prostate cancer and better quality-of-life scores than a diet with less plant-based and more animal-based food. Studies on bladder and kidney cancer are scarce, but limited data suggest that vegetarian or plant-forward dietary patterns (increased consumption of fruits and vegetables and minimizing meat) are associated with a lower risk of development of these cancers than dietary patterns with fewer fruits and vegetables and more meat. With respect to benign urological conditions, epidemiological studies suggest that plant-based dietary patterns are associated with a lower risk of benign prostatic hyperplasia and urinary tract infections than non-plant-based dietary patterns. Compared with diets high in animal-based foods and low in plant-based foods, a substantial body of epidemiological evidence also suggests that increased consumption of healthy plant-based food is associated with a lower risk of erectile dysfunction. Plant-based dietary patterns that are high in fruits and vegetables with normal calcium intake, while limiting animal protein and salt, are associated with a lower risk of kidney stone development than dietary patterns that do not follow these parameters. Overall, increasing consumption of plant-based foods and reducing intake of animal-based foods has favourable associations with multiple urological conditions.

BACKGROUND AND OBJECTIVE/OBJECTIVE:Readability of patient education materials is of utmost importance to ensure understandability and dissemination of health care information in uro-oncology. We aimed to investigate the readability of the official patient education materials of the European Association of Urology (EAU) and American Urology Association (AUA). METHODS:Patient education materials for prostate, bladder, kidney, testicular, penile, and urethral cancers were retrieved from the respective organizations. Readability was assessed via the WebFX online tool for Flesch Kincaid Reading Ease Score (FRES) and for reading grade levels by Flesch Kincaid Grade Level (FKGL), Gunning Fog Score (GFS), Smog Index (SI), Coleman Liau Index (CLI), and Automated Readability Index (ARI). Layperson readability was defined as a FRES of ≥70 and with the other readability indexes <7 according to European Union recommendations. This study assessed only objective readability and no other metrics such as understandability. KEY FINDINGS AND LIMITATIONS/UNASSIGNED:Most patient education materials failed to meet the recommended threshold for laypersons. The mean readability for EAU patient education material was as follows: FRES 50.9 (standard error [SE]: 3.0), and FKGL, GFS, SI, CLI, and ARI all with scores ≥7. The mean readability for AUA patient material was as follows: FRES 64.0 (SE: 1.4), with all of FKGL, GFS, SI, and ARI scoring ≥7 readability. Only 13 out of 70 (18.6%) patient education materials' paragraphs met the readability requirements. The mean readability for bladder cancer patient education materials was the lowest, with a FRES of 36.7 (SE: 4.1). CONCLUSIONS AND CLINICAL IMPLICATIONS/CONCLUSIONS:Patient education materials from leading urological associations reveal readability levels beyond the recommended thresholds for laypersons and may not be understood easily by patients. There is a future need for more patient-friendly reading materials. PATIENT SUMMARY/RESULTS:This study checked whether health information about different cancers was easy to read. Most of it was too hard for patients to understand.

Decisions around prostate-specific antigen screening require a patient-centred approach, considering the benefits and risks of potential harm. Using shared decision-making (SDM) can improve men's knowledge and reduce decisional conflict. SDM is supported by evidence, but can be difficult to implement in clinical settings. An inclusive definition of SDM was used in order to determine the prevalence of SDM in prostate cancer screening decisions. Despite consensus among guidelines endorsing SDM practice, the prevalence of SDM occurring before the decision to undergo or forgo prostate-specific antigen testing varied between 11% and 98%, and was higher in studies in which SDM was self-reported by physicians than in patient-reported recollections and observed practices. The influence of trust and continuity in physician-patient relationships were identified as facilitators of SDM, whereas common barriers included limited appointment times and poor health literacy. Decision aids, which can help physicians to convey health information within a limited time frame and give patients increased autonomy over decisions, are underused and were not shown to clearly influence whether SDM occurs. Future studies should focus on methods to facilitate the use of SDM in clinical settings.

IMPORTANCE/UNASSIGNED:Plant-based diets are associated with many health and environmental benefits, including primary prevention of fatal prostate cancer, but less is known about postdiagnostic plant-based diet patterns in individuals with prostate cancer. OBJECTIVE/UNASSIGNED:To examine whether postdiagnostic plant-based dietary patterns are associated with risk of prostate cancer progression and prostate cancer-specific mortality. DESIGN, SETTING, AND PARTICIPANTS/UNASSIGNED:This longitudinal observational cohort study included men with biopsy-proven nonmetastatic prostate cancer (stage ≤T3a) from the diet and lifestyle substudy within the Cancer of the Prostate Strategic Urologic Research Endeavor (CaPSURE) enrolled at 43 urology practices across the US from 1999 to 2018. Participants completed a comprehensive diet and lifestyle questionnaire (including a validated food frequency questionnaire [FFQ]) between 2004 and 2016. Data were analyzed from August 2022 to April 2023. EXPOSURES/UNASSIGNED:Overall plant-based diet index (PDI) and healthful plant-based diet index (hPDI) scores were calculated from the FFQ. MAIN OUTCOMES AND MEASURES/UNASSIGNED:The primary outcome was prostate cancer progression (recurrence, secondary treatment, bone metastases, or prostate cancer-specific mortality). The secondary outcome was prostate cancer-specific mortality. RESULTS/UNASSIGNED:Among 2062 participants (median [IQR] age, 65.0 [59.0-70.0] years), 61 (3%) identified as African American, 3 (<1%) identified as American Indian or Alaska Native, 9 (<1%) identified as Asian or Pacific Islander, 15 (1%) identified as Latino, and 1959 (95%) identified as White. Median (IQR) time from prostate cancer diagnosis to FFQ was 31.3 (15.9-62.0) months after diagnosis. During a median (IQR) follow-up of 6.5 (1.3-12.8) years after the FFQ, 190 progression events and 61 prostate cancer-specific mortality events were observed. Men scoring in the highest vs lowest quintile of PDI had a 47% lower risk of progression (HR, 0.53; 95% CI, 0.37-0.74; P for trend = .003). The hPDI was not associated with risk of progression overall. However, among 680 individuals with Gleason grade 7 or higher at diagnosis, the highest hPDI quintile was associated with a 55% lower risk of progression compared with the lowest hPDI quintile (HR 0.45; 95% CI, 0.25-0.81; P for trend = .01); no association was observed in individuals with Gleason grade less than 7. CONCLUSIONS AND RELEVANCE/UNASSIGNED:In this cohort study of 2062 men with prostate cancer, higher intake of plant foods after prostate cancer diagnosis was associated with lower risk of cancer progression. These findings suggest nutritional assessment and counseling may be recommended to patients with prostate cancer to help establish healthy dietary practices and support well-being and overall health.