The Demography domain (DM) is a a special-purpose domain that includes a set of essential standard variables that describe each subject in a study. Companies use different methods to distinguish sites and investigators. CDISC assumes that SITEID will always be present, with INVID and INVNAM used as necessary. Every subject in a study must have a subject identifier (SUBJID). In some cases a subject may participate in more than 1 study. To identify a subject uniquely across all studies for all applications or submissions involving the product, a unique identifier (USUBJID) must be included in all datasets.
The DM domain includes required variables that are often not directly collected on the Demography CRF. This data is populated using other sponsor sources of information. There is a guidance on FDA expectations for and recommendations on use of a standardized approach for collecting and reporting race and ethnicity data in submissions for clinical trials (https://www.fda.gov/regulatory-information/-race-and-ethnicity-data-clinical-trials.
Example
This is an example SDTM dataset. This dataset includes information that is expected to be provided, but not usually collected directly on the Demography CRF. This includes RFSTDTC, RFENDTC, RFXSTDTC, RFXENDTC, RFCSTDTC, RFCENDTC, RFICDTC. DTHDTC and DTHFL are also expected to be included. For a subject who has not died, the value of variable DTHF is null. The death date may be blank if unknown. When multiple races were self reported, the applicant recorded "MULTIPLE" as the Race and used Supplemental Qualifiers to record the self-reported race.
dm.xpt
dm.xpt
Row
STUDYID
DOMAIN
USUBJID
SUBJID
RFSTDTC
RFENDTC
RFXSTDTC
RFXENDTC
RFICDTC
RFPENDTC
DTHDTC
DTHFL
SITEID
INVNAM
BRTHDTC
SEX
RACE
ETHNIC
ARMCD
ARM
ACTARMCD
ACTARM
ARMNRS
ACTARMUD
COUNTRY
1
ABC123
DM
ABC123-0001
0001
2006-10-11
2007-01-10
2006-10-11
2007-01-10
2006-10-03
2007-02-01
01
JOHNSON, M
1948-12-13
M
WHITE
NOT HISPANIC OR LATINO
A
Product A
A
Product A
USA
2
ABC123
DM
ABC123-0002
0002
2006-01-15
2006-02-28
2006-01-15
2006-02-28
2006-01-04
2006-03-26
01
JOHNSON, M
1955-03-22
M
WHITE
NOT HISPANIC OR LATINO
B
Product B
B
Product B
USA
3
ABC123
DM
ABC123-0003
0003
2006-01-16
2006-03-19
2006-01-16
2006-03-19
2006-01-02
2006-03-19
01
JOHNSON, M
1938-01-19
F
BLACK OR AFRICAN AMERICAN
NOT HISPANIC OR LATINO
B
Product B
B
Product B
USA
4
ABC123
DM
ABC123-0004
0004
2006-01-07
2006-01-08
01
JOHNSON, M
1941-07-02
M
ASIAN
NOT HISPANIC OR LATINO
SCREEN FAILURE
USA
5
ABC123
DM
ABC123-2001
2001
2006-02-02
2006-03-31
2006-02-02
2006-03-31
2006-01-15
2006-04-12
02
GONZALEZ, E
1950-06-23
F
AMERICAN INDIAN OR ALASKA NATIVE
NOT HISPANIC OR LATINO
B
Product B
B
Product B
USA
6
ABC123
DM
ABC123-2002
2002
2006-02-03
2006-04-05
2006-02-03
2006-04-05
2006-01-10
2006-04-25
02
GONZALEZ, E
1956-05-05
F
NATIVE HAWAIIAN OR OTHER PACIFIC ISLANDERS
NOT HISPANIC OR LATINO
A
Product A
A
Product A
USA
7
ABC123
DM
ABC123-2003
2003
2006-02-07
2006-02-08
03
GONZALEZ, E
1945-04-06
F
MULTIPLE
NOT HISPANIC OR LATINO
SCREEN FAILURE
USA
$warningHtml
Row 1:
Shows USUBJID ABC123-0004 selected "JAPANESE" as the specific ASIAN race collected.
Row 2:
Shows USUBJID ABC123-0003 selected "AFRICAN AMERICAN" as the specific BLACK OR AFRICAN AMERICAN race collected.
Rows 3-4:
Show USUBJID ABC123-2003 specified "AMERICAN INDIAN OR ALASKA NATIVE" and "WHITE " as the race.