Extension Consent Form
A data frame with 137 rows and 9 variables
A dataset with variables as follows:
RID N Participant roster ID
SITEID N Site ID
VISCODE T Visit code
USERDATE S Date record created
USERDATE2 S Date record last updated
INCEXT N Has the participant signed the Informed Consent form for the ADNI Extension (Amendment 3)?
INCEXTDT D If Yes, date signed.