Figure 1.

Cohort of chronic dialysis veterans. Note: To identify dialysis treatment utilization, VA clinic stop codes (601–611) were used to identify VA dialysis service use in VA encounter files and CPT procedure codes (90935, 90937, 90945, 90947, and 90999) were used to identify nonVA dialysis service use in the VA Fee Basis claims files.

Wang et al. BMC Health Services Research 2013 13:26   doi:10.1186/1472-6963-13-26
Download authors' original image