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. Author manuscript; available in PMC: 2021 May 13.
Published in final edited form as: Arch Intern Med. 2011 Oct 10;171(18):1663–1669. doi: 10.1001/archinternmed.2011.436

Table 1.

Characteristics of Study Cohorts

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Abbreviation: USRDS, United States Renal Data System.

a

P < .05 for comparisons with USRDS patients who had initiated dialysis in 2007, based on t test or χ2 test results.

b

Defined as the presence of coronary or peripheral vascular disease or cerebrovascular disease (ie, stroke).

c

Defined as the total number of the above-listed comorbid conditions present in each patient.