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A Mobile Phone-based Intervention to Improve Health Screening Uptake: A Randomized Experiment in Indonesia
Last registered on March 27, 2020

Pre-Trial

Trial Information
General Information
Title
A Mobile Phone-based Intervention to Improve Health Screening Uptake: A Randomized Experiment in Indonesia
RCT ID
AEARCTR-0005047
Initial registration date
November 17, 2019
Last updated
March 27, 2020 3:33 PM EDT
Location(s)

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Primary Investigator
Affiliation
University of Goettingen
Other Primary Investigator(s)
PI Affiliation
University of Goettingen
PI Affiliation
University of Goettingen
PI Affiliation
University of Goettingen
Additional Trial Information
Status
In development
Start date
2019-11-21
End date
2020-09-30
Secondary IDs
Abstract
Our study measures the impact of informative text messages on the uptake of screening for non-communicable diseases (NCDs) such as hypertension and diabetes. The text messages contain information on free public screening services as well as facts about hypertension and diabetes. We test the effect of these messages against no treatment. Our main outcome is the self-reported usage of screening services in the past months, measured at the endline.
External Link(s)
Registration Citation
Citation
Marcus, Maja E. et al. 2020. "A Mobile Phone-based Intervention to Improve Health Screening Uptake: A Randomized Experiment in Indonesia." AEA RCT Registry. March 27. https://doi.org/10.1257/rct.5047-2.0.
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2020-01-06
Intervention End Date
2020-03-06
Primary Outcomes
Primary Outcomes (end points)
NCD screening uptake (individual)
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
NCD diagnosis, NCD screening uptake within households, NCD knowledge
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
We conduct a baseline survey in November and December 2019 to collect information on our respondents as well as the mobile phone numbers. After the baseline, we randomize half of our participants to treatment and half to control. The intervention will take place from January until March 2020. The treatment group receives text messages prior to screening dates, containing facts about diabetes and hypertension as well as information when and where free public screening is available. At the endline, information on screening usage, diagnoses and NCD knowledge is collected for both groups.
Experimental Design Details
Not available
Randomization Method
Randomization done in office by a computer
Randomization Unit
Individual
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
2000
Sample size: planned number of observations
2000
Sample size (or number of clusters) by treatment arms
1000 in the treatment arm, 1000 in the control arm
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Ethics committee of the University of Göttingen
IRB Approval Date
2019-11-14
IRB Approval Number
N/A
Analysis Plan

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