world. Methods: An online questionnaire for nephrologists was designed based on the existing literature with input from patients. Anonymized data was collected on individual and institutional demographics, indications and contraindications for biopsy, and attitudes and barriers to access. A propensity-to-biopsy score was generated from responses which allowed clinicians to compare their practice with international colleagues. A higher score was associated with an increased likelihood of recommending biopsy. The questionnaire was disseminated through international nephrology societies including the National Kidney Foundation and by social media. Results: Participants responding to the questionnaire included 1181 clinicians from 83 countries, making it the largest international study in this area to date. The propensity-to-biopsy scores were significantly different between the thirteen countries with over twenty clinicians participating (P<0.001) and was highest in Mexico and lowest in t

ization or change in health. Background The long-term follow-up of living kidney donors is highly variable in Canada. Methods We surveyed perspectives on postdonation follow-up among 685 living donors in the two largest transplant programs in Canada (43% survey response rate). The anonymous survey was informed by semistructured interviews with 12 living kidney donors. The survey was developed on the basis of themes identified in the semistructured interviews, guidance from the research and clinical teams, and feedback from pilot testing with six previous donors. Results Most (73%) of the respondents received follow-up after the first donation year from a primary care provider, and 70% reported annual follow-up visits, including blood and urine tests. Most (71%) received a follow-up reminder from their transplant center, and follow-up was higher (86% versus 68%) among those receiving reminders. Donors wanted specialist involvement if new health or kidney-related events occurred. Most (7

listing transplanted January 1st, 2010, to May 31st, 2022 (N=9,178) were included from the Scientific Registry of Transplant Recipients. Recipients were stratified into three groups according to Material Community Deprivation Index score, with greater score representing higher neighborhood socioeconomic deprivation. Outcomes were modeled using multivariable logistic regression and Cox proportional hazards models. Results: Twenty-four percent (N=110) of recipients from neighborhoods of high socioeconomic deprivation identified as being of Black race, versus 12% (N=383) of recipients from neighborhoods of low socioeconomic deprivation. Neighborhoods of high socioeconomic deprivation had a much greater proportion of recipients identifying as being of Hispanic ethnicity (67%, N=311), versus neighborhoods of low socioeconomic deprivation (17%, N=562). The hazard of graft loss was 55% higher (aHR 1.55, 95% CI: 1.24, 1.94) for recipients from neighborhoods of high versus recipients from low s

bisphosphonates associates with lower incidence of non-vertebral fractures after kidney transplantation. Methods: We conducted a retrospective review for all Southern California Kaiser Permanente kidney transplant recipients with osteoporosis transplanted between 2000 and 2019. Baseline variables were collected. Those prescribed an oral bisphosphonate were compared to those who were not. The primary outcome was non-vertebral fracture. Chi square was used to evaluate categorical variables and Wilcoxson rank sum test for continuous variables. Propensity scores were generated to balance covariates in the bisphosphonate and non-bisphosphonate groups. Cause-specific hazard and sub distribution (Fine-Gray) methods were performed for competing risk analysis. Death censored graft survival was evaluated as a secondary outcome using standard Cox regression. Results: There were 489 patients included in the study, 203 of which were in the bisphosphonate group. The cause specific hazard model sugge