Supplementary Appendix 1. Diagnostic codes used to define study measures.
Table S1. Diagnostic codes used to define outcome measurements.
Outcome measurement
Diagnostic codea
Gout
274
Acute kidney failure
584
Chronic kidney disease
585
Renal failure, unspecified
586
Nephrolithiasis
592
Other renal disorders
593
a Diagnostic code based on the International Classification of Disease, Ninth
Revision, Clinical Modification (ICD-9-CM).
1
Supplementary Appendix 2. Study design for data integration and ascertainment of the primary
outcome of time to first diagnostic billing claim for gout or pharmacy fill record for a medication
typically used to treat gout among living kidney donors and age- and sex-matched non-donors.
OPTN = Organ Procurement and Transplantation Network.
2
Supplementary Appendix 3. Renal diagnosis rates among living kidney donors (LKD) with gout
compared to non-donors with gout, matched 1:3 by age and sex. P>0.05 for all comparisons.
3