. Author manuscript; available in PMC: 2014 Aug 1.

Published in final edited form as: Am J Kidney Dis. 2013 Mar 15;62(2):236–244. doi: 10.1053/j.ajkd.2013.01.019

Table 1.

Race and ethnicity in source population and in study cohort.

Race & Ethnicity	Source Population	Study Cohort
	(N = 4,719,817)	(n = 1,119,816)
White	1,180,131 (25.00)	526,498 (47.02)
Hispanic	1,199,181 (25.41)	350,919 (31.34)
Black	313,666 (6.65)	136,923 (12.23)
Asian & Pacific Islander	272,510 (5.77)	105,476 (9.42)
Native American	5,591 (0.12)	NA
Multiple	8,157 (0.17)	NA
Other	70,152 (1.49)	NA
Unknown	1,670,429 (35.39)	NA

Note: The source population was adult health system members from 1^st January 2003 to 31^st Dec 2009. The percent of adults with >2 serum creatinine tests whose race was unknown was 9.2%. The study cohort consisted of those with >2 serum creatinine tests, an entry estimated glomerular filtration rate >15 mL/min/1.73m², and >180 days between the first and last serum creatinine test. Values are given as number (percentage).

NA, not applicable because excluded from analysis.