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

Sponsor
National Bureau of Economic Research, Inc. (Other)
Overall Status
Active, not recruiting
CT.gov ID
NCT04870593
Collaborator
(none)
3,006
Enrollment
1
Location
8
Arms
26.7
Anticipated Duration (Months)
112.4
Patients Per Site Per Month

Study Details

Study Description

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.

Condition or DiseaseIntervention/TreatmentPhase
  • Behavioral: Information
  • Behavioral: Buddy
  • Behavioral: Gossip intervention
  • Behavioral: Information assigned in community
  • Behavioral: Buddy assigned in community
N/A

Study Design

Study Type:
Interventional
Actual Enrollment :
3006 participants
Allocation:
Randomized
Intervention Model:
Parallel Assignment
Masking:
None (Open Label)
Primary Purpose:
Other
Official Title:
What Works to Get the Elderly Vaccinated Against COVID-19? Experimental Evidence From India
Actual Study Start Date :
Apr 17, 2021
Anticipated Primary Completion Date :
Jul 10, 2023
Anticipated Study Completion Date :
Jul 10, 2023

Arms and Interventions

ArmIntervention/Treatment
Experimental: Community receives buddy and gossip treatment, individual informed directly (arm (1))

(i) Individual elder given vaccination information. (ii) Individual 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. (iii) 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 and to encourage their communities to use the buddy system to get elders vaccinated.

Behavioral: Information
Elder informed about vaccination.

Behavioral: Buddy
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.

Behavioral: Gossip 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.

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Behavioral: Buddy assigned in community
Buddy intervention assigned for other elders in community.

Experimental: Community receives buddy and gossip treatment, individual not informed directly (arm (2))

Individual elder lives in community with elders in arm (1).

Behavioral: Gossip 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.

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Behavioral: Buddy assigned in community
Buddy intervention assigned for other elders in community.

Experimental: Community receives gossip treatment, individual informed directly (arm (3))

(i) Individual elder given vaccination information. (ii) 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.

Behavioral: Information
Elder informed about vaccination.

Behavioral: Gossip 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.

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Experimental: Community receives gossip treatment, individual not informed directly (arm (4))

Individual elder lives in community with elders in arm (3).

Behavioral: Gossip 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.

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Experimental: Community receives buddy treatment, individual informed directly (arm (5))

(i) Individual elder given vaccination information. (ii) Individual 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.

Behavioral: Information
Elder informed about vaccination.

Behavioral: Buddy
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.

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Behavioral: Buddy assigned in community
Buddy intervention assigned for other elders in community.

Experimental: Community receives buddy treatment, individual not informed directly (arm (6))

Individual elder lives in community with elders in arm (5).

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Behavioral: Buddy assigned in community
Buddy intervention assigned for other elders in community.

Experimental: Community receives information, individual informed directly (arm (7))

Individual elder given vaccination information.

Behavioral: Information
Elder informed about vaccination.

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Experimental: Community receives information, individual not informed directly (arm (8))

Individual elder lives in community with elders in arm (7).

Behavioral: Information assigned in community
Information intervention assigned for other elders in community.

Outcome Measures

Primary Outcome Measures

  1. Received at least one shot [8 weeks after intervention]

    Elders 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.

  2. Received two shots [8 weeks after intervention]

    Elders 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.

Eligibility Criteria

Criteria

Ages Eligible for Study:
55 Years and Older
Sexes Eligible for Study:
All
Accepts 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

Contacts and Locations

Locations

SiteCityStateCountryPostal Code
1JPAL SA at IFMRChennaiTamil NaduIndia

Sponsors and Collaborators

  • National Bureau of Economic Research, Inc.

Investigators

None specified.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.
Responsible Party:
Esther Duflo, Professor, National Bureau of Economic Research, Inc.
ClinicalTrials.gov Identifier:
NCT04870593
Other Study ID Numbers:
  • 1702861995A021
First Posted:
May 3, 2021
Last Update Posted:
Nov 17, 2021
Last Verified:
Nov 1, 2021
Studies a U.S. FDA-regulated Drug Product:
No
Studies a U.S. FDA-regulated Device Product:
No
Additional relevant MeSH terms:

Study Results

No Results Posted as of Nov 17, 2021