Name Steward Organization Suggested Domain Suggested Domain Description Cde Group Classification
4h1. After a head injury, what was the longest period of time that the participant was unconscious? NACC Disease characterization
Including Alzheimer's Disease (AD)/AD-Related Dementias (ADRD) diagnosis and multiple chronic conditions (MCCs)
 Other NIA-funded studies
  • ▼ NACC
    • ▼ Uniform Data Set
      • ▼ Form name- A5/D2: Participant Health History/Clinician-assessed Medical Conditions
        • ▼ Packet- Initial Visit Packet
          • Variable name- headinjunc

# Datatype

UUID: bc521722-7623-5c26-bfe3-4d342abc0fb5

Value List

# Permissible value Value meaning name

UUID: cfb22ad6-974f-5f67-bf46-0a2fd01b6543

0 Less than 5 minutes

UUID: 772f3e3e-d843-50e8-a2ad-82d900904efc

1 5 minutes to less than 30 minutes

UUID: 70d467cc-8c36-55d3-9af1-9c81f6558de3

2 30 minutes to less than 24 hours

UUID: bc447694-a797-5196-8bc2-314b3ec1a771

3 1 to less than 7

UUID: 7d503e55-4328-5e32-a6c4-b4715a5e6041

4 7 or more

UUID: 687f52c3-661e-5637-8288-f62b34c0ef33

8 Not applicable, no loss of consciousness

UUID: 11a2fa3a-743e-5bee-99f6-8f5426b27528

9 Unknown duration

# Identifier Origin Version

UUID: d838a814-3420-56ec-bb18-27262c6ef27c

UDS_a5d2_Initial Visit Packet_headinjunc NACC-source_dataset+form_name+packet+var_name NACC_uds-v4-ivp-ded-11122025