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Use of Airtime Incentives to Improve Short Message Service Surveys in Colombia and Tanzania

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ClinicalTrials.gov Identifier: NCT03768934
Recruitment Status : Not yet recruiting
First Posted : December 7, 2018
Last Update Posted : December 12, 2018
Sponsor:
Collaborators:
The Bloomberg Family Foundation, Inc.
Ifakara Health Institute
Pontificia Universidad Javeriana
Information provided by (Responsible Party):
Johns Hopkins Bloomberg School of Public Health

Brief Summary:
This study evaluates the effect of four different airtime incentive amounts on short message service (SMS) survey cooperation, response, refusal and contact rates, as compared to control group, in Colombia and Tanzania.

Condition or disease Intervention/treatment Phase
Surveys and Questionnaires Noncommunicable Diseases Other: 1X airtime incentive Other: 2X airtime Incentive Other: Lottery airtime incentive Not Applicable

Detailed Description:
Using random digit dialing (RDD) sampling technique, participants were randomized to one of four airtime incentive amounts contingent on them completing the noncommunicable disease risk factor survey. This mobile phone survey will be sent as a short message service (SMS). In SMS surveys, participants use their touch tone key pad to answer written questions. (i.e. If you are male, press 1; If you are female, press 2). This study will be conducted in both Colombia and Tanzania.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 1504 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: Participants will be randomized to one of four airtime amounts: 1) no incentive; 2) 1X incentive; 3) 2X incentive or 4) a lottery incentive, in which one out of every 20 participants will receive the incentive.
Masking: Single (Outcomes Assessor)
Primary Purpose: Other
Official Title: A Randomized Controlled Trial of Airtime Incentives to Improve Short Message Service (SMS) Survey Performance in Colombia and Tanzania
Estimated Study Start Date : December 15, 2018
Estimated Primary Completion Date : January 15, 2019
Estimated Study Completion Date : January 30, 2019

Arm Intervention/treatment
No Intervention: Control
No airtime incentive for completing the survey
Experimental: 1X Incentive
1X airtime incentive
Other: 1X airtime incentive
An incentive given in the form of airtime.

Experimental: 2X incentive
2X airtime incentive
Other: 2X airtime Incentive
An incentive given in the form of airtime.

Experimental: Lottery Incentive
Lottery airtime incentive where odds of winning lottery are 1 out of 20
Other: Lottery airtime incentive
An incentive given in the form of airtime.




Primary Outcome Measures :
  1. Cooperate Rate #1 [ Time Frame: Through study completion, an average of one month ]
    As defined by American Association for Public Opinion Research, cooperation rate is defined as I/(I+P+R) where I is complete interviews, P is partial interviews, and R is refusals and breakoffs.

  2. Response Rate #4 [ Time Frame: Through study completion, an average of one month ]
    As defined by American Association for Public Opinion Research, response rate is defined as (I+P)/(I+P+R+eU) where I is complete interviews, P is partial interviews, R is refusals and breakoffs, and eU is the estimated eligible proportion of unknowns.


Secondary Outcome Measures :
  1. Refusal Rate #2 [ Time Frame: Through study completion, an average of one month ]
    As defined by American Association for Public Opinion Research, refusal rate is defined as (R)/(I+P+R+eU) where R is refusals and breakoffs, I is complete interviews, P is partial interviews, and eU is the estimated eligible proportion of unknowns.

  2. Contact Rate #2 [ Time Frame: Through study completion, an average of one month ]
    As defined by American Association for Public Opinion Research, contact rate is defined as (I+P+R)/(I+P+R+eU) where I is complete interviews, P is partial interviews, R is refusals and breakoffs, and eU is the estimated eligible proportion of unknowns.



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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Access to a mobile phone
  • Greater or equal to 18 years of age
  • In Colombia, conversant in the Spanish language. In Tanzania, conversant in the Swahili language.

Exclusion Criteria:

  • Less than 18 years of age

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03768934


Contacts
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Contact: Dustin G Gibson, PhD 4432878763 dgibso28@jhu.edu
Contact: George W Pariyo, PhD 4105025790 gpariyo1@jhu.edu

Locations
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Colombia
Instituto de Salud Publica Pontificia Universidad Javeriana
Bogota, D.c., Colombia
Tanzania
Ifakara Health Institute
Dar Es Salaam, Tanzania
Sponsors and Collaborators
Johns Hopkins Bloomberg School of Public Health
The Bloomberg Family Foundation, Inc.
Ifakara Health Institute
Pontificia Universidad Javeriana
Investigators
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Principal Investigator: Adnan A Hyder, PhD, MBBS Johns Hopkins University Bloomberg School of Public Health
Principal Investigator: George W Pariyo, PhD Johns Hopkins University Bloomberg School of Public Health

Publications:
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Responsible Party: Johns Hopkins Bloomberg School of Public Health
ClinicalTrials.gov Identifier: NCT03768934     History of Changes
Other Study ID Numbers: 00007318-4.2
First Posted: December 7, 2018    Key Record Dates
Last Update Posted: December 12, 2018
Last Verified: December 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Johns Hopkins Bloomberg School of Public Health:
mobile phone surveys
short message service
incentive

Additional relevant MeSH terms:
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Noncommunicable Diseases
Chronic Disease
Disease Attributes
Pathologic Processes