SDTM mapping strictly adherence to SDTM implementation guide, also follows the FDA guidelines. Specially date and time follows the ISO 8601 format.
Example- DTC STDTC
Formats are followed like that
YYYY-MM-DDTHH:MM: SS also this variable must be a character value. Whenever some date and time comes under duration it will be written like that but format should be ISO 8601 format only.
Duration recorded DUR value
2 Years p2Y
10 weeks p10w
3 months 10 days p3m10d
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