Impact of Health Shocks on Lifestyle Behavioural Changes
Last registered on October 28, 2019


Trial Information
General Information
Impact of Health Shocks on Lifestyle Behavioural Changes
Initial registration date
October 25, 2019
Last updated
October 28, 2019 1:27 PM EDT
Primary Investigator
European University Institute
Other Primary Investigator(s)
Additional Trial Information
Start date
End date
Secondary IDs
There are two branches of this study, each will be written as its own paper. The first will assess the impact of receiving a health shock on di fferent lifestyle behaviour outcomes; it will also study how the response to the shock may vary across diff erent behaviours. The
health shock will be modelled as a signal (information) of the relationship between diff erent lifestyle behaviours and health, as well as a signal on health status. The outcomes will be diet, exercise, smoking, and alcohol consumption.

The second study, which will build upon the fi rst, shall investigate how much the (Big 5) personality characteristics can explain variation in changes to lifestyle behaviours that are expected to be found in the fi rst study. In other words, the second study will try to provide
a possible explanation for why some individuals do make successful lifestyle changes after a health shock given that there is literature suggesting that many people do not.
External Link(s)
Registration Citation
Verdun, Zoey. 2019. "Impact of Health Shocks on Lifestyle Behavioural Changes." AEA RCT Registry. October 28.
Experimental Details
Intervention Start Date
Intervention End Date
Primary Outcomes
Primary Outcomes (end points)
The difference between the pre-treatment and post-treatment value for each of the following outcomes:

1) Diet - Number of servings of fruit and vegetables consumed per day

2) Exercise - Number of days in the past four weeks did a walk of at least 10 minutes
3) Exercise - Number of days in the past four weeks spent walking 30 minutes or more

4) Smoking - Currently smoke cigarettes (or not)
5) Smoking - Number of cigarettes smoked per day

6) Alcohol - Number of days had an alcoholic drink in the past 7 days
7) Alcohol - Total number of drinks10 consumed on heaviest drinking day in the past 7 days
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Health shock is captured by a diagnosis of a heart attack and/or diabetes. The use of the matching empirical approach will provide a way to have comparable treatment and control groups. Outcome
Experimental Design Details
Randomization Method
The matching technique is used such that, controlling for observable characteristics, especially pre-treatment risk of a health shock, individuals receive the health shock as good as randomly.
Randomization Unit
Individual, clustered at the household.
Was the treatment clustered?
Experiment Characteristics
Sample size: planned number of clusters
Some of the individuals are most likely in a household together, therefore the analysis is clustered at the household level. I do not know how many households are in my sample.
Sample size: planned number of observations
16,000-20,000 individuals
Sample size (or number of clusters) by treatment arms
200-300 individuals treated, the rest of the 16,000-20,000 individuals are controls.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB Name
IRB Approval Date
IRB Approval Number
Analysis Plan

There are documents in this trial unavailable to the public. Use the button below to request access to this information.

Request Information
Post Trial Information
Study Withdrawal
Is the intervention completed?
Is data collection complete?
Data Publication
Data Publication
Is public data available?
Program Files
Program Files
Reports and Papers
Preliminary Reports
Relevant Papers