Variable	No. people (%)
Gender
Female	227 (50.4)
Male	222 (49.3)
Transgender or other	1 (0.2)
Age (mean, SD)	60 (16.2)
Race
White	336 (74.7)
Black	78 (17.3)
Other	36 (8.0)
Visit type
Return visit	321 (71.3)
New visit	129 (28.7)
Chronic kidney disease stage (eGFR)
Stage 1 or 2 (≥60)	116 (25.8)
Stage 3 (30–59)	196 (43.6)
Stage 4 (15–29)	105 (23.3)
Stage 5 (<15)	33 (7.3)
Reported OTC use
Aspirin	173 (38.4)
Ibuprofen	55 (12.2)
Naproxen	14 (3.1)
Omeprazole	84 (18.7)
Esomeprazole	8 (1.8)
Lansoprazole	5 (1.1)

Abbreviations used: OTC, over-the-counter; eGFR, estimated glomerular filtration rate.