Variables
The RADC's variables are organized by research domain categories. Browse the listing below for more information on those categories, or find descriptions for specific variables through the index or search functions. Example data dictionaries that document the collection forms of requested datasets are also available.
Currently filtering using: All categories and variables
Categories
| Actigraphy | Activity measured with portable actigraph |
|---|---|
| Affect and Personality | Emotional affect and personality measures |
| ApoE and TOMM40 | ApoE and TOMM40 genetic variants |
| Blood Measures | Measures derived from blood samples |
| Brain Proteins | Measures of brain proteins |
| Clinical Diagnosis | Clinical diagnoses including dementia, Alzheimer's dementia, and mild cognitive impairment |
| Cognition | Cognitive function |
| Cultural Experiences | Measures related to cultural experiences |
| Decision Making and Behavioral Economics | Measures of decision making, neuroeconomics, and behavioral economics |
| Demographics | Basic demographic information including age, sex, race and education |
| Depression | Depressive symptomatology |
| Digital Pen Device | Digital capture of behavior |
| Disabilities | Measures of disability |
| Female Reproductive History | Measures of female reproductive history |
| Frailty | Measures of frailty |
| Lifestyle | Measures of lifestyle, behavior, and activity |
| Medical Conditions | Chronic medical conditions and risk factors |
| Medicare Claims | Research Identifiable Files requested from CMS |
| Medications | Participants' current prescription medications, vitamins, supplements, and over-the-counter remedies and medicines documented at interview |
| Metabolism | Measures of metabolism |
| Metabolomics | Metabolomics data |
| Motor and Gait | Measures of motor function and gait from performance-based tests and devices |
| Neck, Low Back and Joint Pain | Measures of neck, low back and joint pain |
| Neuroimaging | In vivo magnetic resonance imaging |
| Nutrition | Measures of nutrition |
| Olfaction | Measures of ability to smell |
| Pathology | Post-mortem neuropathologic evaluation |
| Pulmonary Function | Measures of pulmonary function |
| Sleep and Circadian Rhythms | Measures of sleep and circadian rhythms |
| SES and Cognitive Resources | Measures of socioeconomic status and cognitive resources |
| Vision | Measures of vision |
| Well-being | Measures of well-being |
Variables
The variable index page provides a listing of all available variables in one table, organized by category.
Category and Variable Text Search
Search documentation for phrase.
Standard Dataset Variables
View Standard Dataset Variables
Data Dictionaries
Data dictionaries are documents describing data collection forms used to conduct participant interviews, cognitive testing, clinical evaluations, and diagnoses. Several examples of these data dictionaries are available for review.
NACC UDS Compatible Data
Some of the data collected in RADC cohort studies are directly compatible with data collected by other ADC's on NACC Uniform Data Set (UDS) forms. The compatible variables have been documented and prepared as standard datasets for distribution through data requests.