Individuals with End Stage Renal Disease (ESRD), regardless
of age, are eligible for Medicare. The United States
Renal Data System combines data from the Centers for
Medicare and Medicaid Services (CMS) with other databases
to provide information on ESRD patients.
VIReC has obtained USRDS data for all individuals with
ESRD. In addition, VIReC has a crosswalk file
that allows linking the individual identifier (USRDS
ID) to the real or scrambled SSNs for veterans in the VHA
cohort. The number of individuals with ESRD
found in the VHA cohort for each year is listed in the
table below.
| |
Total number of patients being
treated for ESRD
|
Number of patients being treated
for ESRD who are in the VHA
cohort |
|
1992
|
346,237
|
17,155 (4.95%)
|
|
1993
|
374,030
|
19,938 (5.33%)
|
|
1994
|
400,469
|
22,335 (5.58%)
|
|
1995
|
429,239
|
25,624 (5.97%)
|
|
1996
|
453,943
|
29,198 (6.43%)
|
|
1997
|
474,797
|
33,848 (7.13%)
|
|
1998
|
498,028
|
38,475 (7.73%)
|
|
1999
|
519,971
|
43,933 (8.45%)
|
|
2000
|
534,601
|
49,262 (9.21%)
|
|
2001
|
547,659
|
52,784 (9.64%)
|
|
2002
|
553,964
|
55,722 (10.06%)
|
|
2003
|
526,787
|
52,968 (10.05%)
|
Data taken from Condensed Treatment History file (RXHIST60)
Documentation
2005
Researcher’s Guide to the USRDS Database
Data Available
The USRDS data are provided in groups of files called
CDs. The Core CD contains the most frequently used
files and is needed for use of the Transplant CD, Hosptial
CD, or any Medicare claims files. The Core CD,
Transplant CD, and Hospital CD contain cumulative files
that are current through 2005. Some of these files
contain data since 1973, when Medicare first began covering
ESRD patients.
In addition to obtaining 1999-2003 Medicare claims data
for all patients with ESRD, we also have obtained Medicare
claims for patients involved in two special studies,
the Dialysis Morbidity & Mortality Study (DMMS) and
the Case Mix Adequacy Study. Non-claims data for
these studies are found in the Core CD. A desciption
of these special studies can be found in the research
guide (above).
VIReC has also obtained two years of "pre-dialysis" claims
data for patients who initiated dialysis during 2000
and 2001. For patients who initiated dialysis during
2000, we have claims for 1998 and 1999; for patients
who began dialysis during 2001, we have claims for 1999
and 2000.
Below is a list of the files found in each CD with a
link to its SAS® Proc Contents.
Core CD
Transplant CD
Hospital CD
Claims for all beneficiaries with ESRD
| |
Years Available
|
| Institutional Claims |
|
|
|
|
|
| Institutional Claims Details |
|
|
|
|
|
| Physician/Supplier Claims |
|
|
|
|
2003
|
Claims for Special Study - DMMS
Claims for Special Study - Case Mix Adequacy
Pre-dialysis claims
| |
2000 Incident Cohort
|
2001 Incident Cohort
|
| Year 1 Institutional Claims |
|
|
| Year 1 Institutional Claims Details |
|
|
| Year 1 Physician/Supplier Claims |
|
|
| Year 2 Institutional Claims |
|
|
| Year 2 Institutional Claims Details |
|
|
| Year 2 Physician/Supplier Claims |
|
|
|
|
