Fracture Risk in Living Kidney Donors

\*Donors\* Inclusion Criteria: Living kidney donors who underwent donor nephrectomy in Ontario, Alberta, and British Columbia, Canada, between July 1, 1992, and March 31, 2024 are eligible to enter the study. Exclusion criteria: * Any person with data errors in their database records (such as missing or invalid age; it is not expected to exclude very few persons for these reasons). Data errors also include evidence of prior dialysis or a prior solid organ transplant, as such individuals are not eligible to become donors. * Any person who was not a permanent resident of the province (i.e., they live outside of the province, and only came to the province to donate a kidney to their intended recipient). This will include anyone who is not eligible for the province's health insurance plan, anyone whose date of last contact in the databases is less than 1 year after the cohort entry date, and any person without a physician visit in the last 1-year. * Any person who is \<18 years of age on the date of nephrectomy (as only under exceptional circumstances should a person less than 18 be approved for living donation). \*Non-donors\* Inclusion criteria: Before nephrectomy, living donors undergo rigorous health screening. A similarly healthy segment of the general population will be selected using restriction and matching. Nondonors will be randomly assigned a cohort-entry date (simulated nephrectomy date). This will apply to all persons who were citizens in the province, according t…