KIDHIST is a horizontally structured data file with one record for each participant. It contains key clinical and date variables describing each participant’s kidney disease history. Clinical variables include primary CKD diagnosis, current CKD status (no history of RRT, on dialysis, transplant recipient, and in rare cases, death), study status at last visit, and parametric estimates of each participant’s baseline GFR and percentage change in GFR over follow-up. Date variables document the following occurrences: birth, date of kidney disease onset, study baseline, last date RRT free, first transplant, first dialysis, last date known alive (i.e., last contact date), and in rare cases, date of death. This file also includes participant sex.