Name Steward Organization Suggested Domain Suggested Domain Description Cde Group Classification
18. I feel like I don't have enough friends NACC Social determinants of health
Social determinants of health (e.g., financial, education, and living arrangements), but not environmental data (e.g., weather data, pollutant data)
Other NIA-funded studies
  • NACC
    • Uniform Data Set
      • Form name- A1a: Social Determinants of Health Optional Form
        • Packet- Initial Visit Packet
          • Section- Social connections, activities, and environment
            • Variable name- friends

# Datatype
Value List

# Permissible value Value meaning name
1 Strongly disagree
2 Disagree
3 Neither disagree or agree
4 Agree
5 Strongly agree
8 Prefer not to answer

# Identifier Origin Version
UDS_a1a_Initial Visit Packet_friends NACC-source_dataset+form_name+packet+var_name NACC_uds-v4-ivp-ded-11122025