Variables related to Demographics

idVariableDescriptionCollectedFile
AGEAge at screeningAge at screening. Computed from Form 2 birth date.
*Age at screening may differ from the age stratum to which a participant was randomized, due to participants requesting a correction to their Form 2 birth date after randomization. Once a participant was randomized to a specific age stratum, they remained in that stratum despite corrections to their birth date. Therefore, the "Age stratum at randomization or enrollment" variable may differ from the age reflected in this variable.
Baseline, MainDemographics and Study Membership (CT+OS)
AGERAge group at screeningComputed from Form 2 birth date. Age categorized into three 10-year intervals (<50-59, 60-69 and 70-79+).
*Categorization of this variable may differ from the "Age stratum at randomization or enrollment" variable due to participants requesting a correction to their Form 2 birth date after randomization/enrollment.
Baseline, MainDemographics and Study Membership (CT+OS)
AGESTRATAge stratum at randomization or enrollment
*Based on the birth date reported by the participant at the time of randomization or enrollment. Categorization of the Age at Screening variable may differ due to participants requesting a correction to their Form 2 birth date after randomization.
Baseline, MainDemographics and Study Membership (CT+OS)
REGIONU. S. RegionResidence at the time of randomization or enrollment. Four categories based on US Census definition.Baseline, MainDemographics and Study Membership (CT+OS)
LANGPreferred LanguageBaseline, MainDemographics and Study Membership (CT+OS)