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How do nudges affect no-shows to cancer screening in times of pandemic? evidence from mammography during COVID19 outbreak
Last registered on November 12, 2020

Pre-Trial

Trial Information
General Information
Title
How do nudges affect no-shows to cancer screening in times of pandemic? evidence from mammography during COVID19 outbreak
RCT ID
AEARCTR-0006684
Initial registration date
November 11, 2020
Last updated
November 12, 2020 8:17 AM EST
Location(s)

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Primary Investigator
Affiliation
Other Primary Investigator(s)
Additional Trial Information
Status
In development
Start date
2020-11-10
End date
2021-03-31
Secondary IDs
Abstract
In this work, we will examine the effect of SMS reminders on no-shows to mammograms through a controlled experiment emphasizing the effect of different behavioral mechanisms on the degree of influence of the messages. In particular, we will focus on two types of content. The first emphasizes the health cost that comes with failing to get a mammogram (a mechanism based on selfish consideration). The second is based on the harm to other women waiting in line for examination (a mechanism based on altruistic consideration). We will examine the effect of this content on the degree of non-arrival to examination relative to a laconic text reminder
External Link(s)
Registration Citation
Citation
Goldshtein, Hadar. 2020. "How do nudges affect no-shows to cancer screening in times of pandemic? evidence from mammography during COVID19 outbreak." AEA RCT Registry. November 12. https://doi.org/10.1257/rct.6684-1.0.
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2020-11-10
Intervention End Date
2021-02-28
Primary Outcomes
Primary Outcomes (end points)
we believe that the type of the SMS – reminders can affect women to show in the test. We consider that the treatment groups will bring more women to the test.
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
In our experiment we will send SMS reminder messages to women who had scheduled a mammogram test.

Randomization will be performed as follows:

Control group. The SMS message will contain information about the test location, time and date.

Treatment group No. 1. Like the control group, The SMS will contain information about the test location, time and date, and also information about the risk of breast cancer and the associated mortality rates in Israel and how early detection of the disease saves lives.

Treatment group No. 2. 2: Like the control group, The SMS will contain information about the test location, time and date, and in addition an altruistic supplement - a reminder that non arrival without prior notice, would delay appointments of other women who are in need of the mammogram
Experimental Design Details
Not available
Randomization Method
We use the randomness in the last digit of the woman's ID to assign women to one of the 3 groups. E.g., women who have 0-3 in their last digit ID will receive the regular SMS remainder (the control group).
Randomization Unit
the participants in the trial are women, patients, that come to the hospitals to do a mammography scan. the experiment is not clustered
Was the treatment clustered?
No
Experiment Characteristics
Sample size: planned number of clusters
no cluster
Sample size: planned number of observations
10,000 women
Sample size (or number of clusters) by treatment arms
treatment 1: 3333 women
treatment 2: 3333 women
control: 3333 women
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Ben-Gurion University of the Negev
IRB Approval Date
2020-09-06
IRB Approval Number
0052-20-ASMC