Basics (Study basics) 19
Name
Label
Description
Unit
DataType
age at 12m
Age at expected date of 12m follow-up (if more precise age needed, calculate from measure date and age_bl)
Years
Integer
age at 6m
Age at expected date of 6m follow-up (if more precise age needed, calculate from measure date and age_bl)
Years
Integer
questionnaire date 12m
Date of questionnaire completion at 12 months. Not recorded for all participants.
Date
questionnaire date 6m
Date of questionnaire completion at 6 months. Not recorded for all participants.
Date
questionnaire date bl
Date of questionnaire completion at baseline. Not recorded for all participants.
Categorical
withdrawal type
Type of withdrawal - full or partial. This variable records all withdrawals notes by the point of preparation of the 12m dataset but refer also to withdrawn_by_12m for which withdrawals had occurred by which study follow-up point. If for instance you are interested in withdrawals at 12m then ignore withdrawn_by_12m = later.
Categorical
withdrawn by
Point in the study by which participant had withdrawn. If for instance you are interested in withdrawals at 12m then ignore withdrawn_by_12m = later.
Categorical