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PREFL

Pre-treatment Flag

Char

Y

Cond

Character indicator of whether the observation occurred before the subject started treatment

Example derivation:

If ASTDT < ADSL.TRTSDT then PREFL="Y"

This variable is conditional on whether the concept of pre-treatment is a feature of the study and used in analysis.

FUPFL

Follow-up Flag

Char

Y

Cond

Character indicator of whether the observation occurred while the subject was on follow-up

Example derivation:

If ASTDT > ADSL.TRTEDT then FUPFL="Y"

This variable is conditional on whether the concept of follow-up is a feature of the study and used in analysis.