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What Works to Get the Elderly Vaccinated Against COVID-19? Experimental Evidence From India

What Works to Get the Elderly Vaccinated Against COVID-19? Experimental Evidence From India

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04870593
Enrollment
3006
Registered
2021-05-03
Start date
2021-04-17
Completion date
2022-09-30
Last updated
2023-03-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Aging, Covid19

Brief summary

COVID-19 poses a substantial risk to elderly populations; understanding how to get elders vaccinated against the virus is therefore a policy priority. An experiment with elders in Tamil Nadu, India will be used to evaluate interventions policymakers might use to raise vaccination rates amongst the elderly. The particular interventions being tested are: calling elders to inform them about vaccination; encouragement of a buddy system, whereby elders are accompanied to the vaccination site by another adult who could also get the vaccine; and seeding vaccination information with gossips, individuals who elders identify as being good at spreading information in the elders' communities. The interventions are phone-based, and can be implemented quickly and at low cost. This makes them promising strategies the Tamil Nadu government and other governments could use to vaccinate elderly populations against COVID-19.

Interventions

BEHAVIORALInformation

Elder informed about vaccination.

BEHAVIORALBuddy

Elder encouraged to get vaccinated using buddy system, whereby he/she is accompanied to the vaccination site by another adult who could also get the vaccine. A potential buddy also given vaccination information and encouraged to help the elder get to the vaccination site so they could both be vaccinated.

BEHAVIORALGossip intervention

Members of elder's community asked who in the community is good at spreading information. These gossips then asked to spread information about vaccination of elders. If buddy intervention assigned in community, gossips also asked to encourage their communities to use the buddy system to get elders vaccinated.

BEHAVIORALInformation assigned in community

Information intervention assigned for other elders in community.

BEHAVIORALBuddy assigned in community

Buddy intervention assigned for other elders in community.

Sponsors

National Bureau of Economic Research, Inc.
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
55 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* At least 55 years of age * Has phone number

Exclusion criteria

\- Not part of the experiments registered under protocol IDs 223749 or 172020

Design outcomes

Primary

MeasureTime frameDescription
Received at least one shot8 weeks after interventionElders asked on phone call if they have received zero, one, or two doses of COVID-19 vaccine. Outcome takes the value of 1 if they received at least one shot, and 0 otherwise.
Received two shots8 weeks after interventionElders asked on phone call if they have received zero, one, or two doses of COVID-19 vaccine. Outcome takes the value of 1 if they received two shots, and 0 otherwise.

Countries

India

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026