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USDV4
Uniform Data Set version 4
UDSv4 - Template
United States
Reference ID
USDv4
Producer(s)
National Alzheimer’s Coordinating Center (NACC) and the NIA-funded ADRC network
Collections
Clinical Trial
Metadata
DDI/XML
JSON
Created on
Jul 02, 2026
Last modified
Jul 07, 2026
Page views
11416
Study Description
Data Dictionary
Data files
UDSv4TemplateForXMLD_2026-04-14_0731.REDCap.xml
Variable Groups
Form Header
Custom Instrument
A1 Participant Demographics
A1a Social Determinants of Health
A2 Co-participant demographics
A3 Participant Family History
A4 Participant Medications
A4a ADRD Specific Treatments
A5-D2: Participant Health History/Clinician-assessed Medical Conditions
B1 Vital Signs and Anthropometrics
B3 Unified Parkinson's Disease Rating Scale (UPDRS) - Motor Exam
B4 CDR Dementia Staging Instrument
B5 Neuropsychiatric Inventory Questionnaire (NPIQ)
B6 Geriatric Depression Scale
B7 Functional Assessment Scale (FAS)
B8 Neurological Examination Findings
B9 Clinician Judgment Of Symptoms
C2/C2T Neuropsychological Battery Scores
D1a Clinical Syndrome
D1b Etiological Diagnosis and Biomarker Support
Variable Groups
Variable group: B1 Vital Signs and Anthropometrics
Variables
21
b1_vital_signs_and_anthropo
metrics_complete
Complete?
b1not
0d1. If 'B1 Evaluation Form: Physical' not submitted, specify reason
bpdiasl1
5a1b. Participant blood pressure - Left arm: Diastolic Reading 1
bpdiasl2
5a2b. Participant blood pressure - Left arm: Diastolic Reading 2
bpdiasr1
5b1b. Participant blood pressure - Right arm: Diastolic Reading 1
bpdiasr2
5b2b. Participant blood pressure - Right arm: Diastolic Reading 2
bpsysl1
5a1a. Participant blood pressure - Left arm: Systolic Reading 1
bpsysl2
5a2a. Participant blood pressure - Left arm: Systolic Reading 2
bpsysr1
5b1a. Participant blood pressure - Right arm: Systolic Reading 1
bpsysr2
5b2a. Participant blood pressure - Right arm: Systolic Reading 2
frmdateb1
0a. B1 Evaluation Form: Physical - Form date
height
1. Participant height (inches)
hip1
4a. Hip circumference measurements (inches): Measurement 1
hip2
4b. Hip circumference measurements (inches): Measurement 2
hrate
6. Participant resting heart rate (pulse)
initialsb1
0b. B1 Evaluation Form: Physical - Examiner's initials
langb1
0c. B1 Evaluation Form: Physical - Language
modeb1
0d. B1 Evaluation Form: Physical - In-person or not completed?
waist1
3a. Waist circumference measurements (inches): Measurement 1
waist2
3b. Waist circumference measurements (inches): Measurement 2
weight
2. Participant weight (lbs.)
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