Risk and Personalized Support for Patients and Families: A Field Experiment in a Major Chinese Hospital

Last registered on April 02, 2024


Trial Information

General Information

Risk and Personalized Support for Patients and Families: A Field Experiment in a Major Chinese Hospital
Initial registration date
March 21, 2024

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
April 02, 2024, 10:39 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.


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Primary Investigator

Tsinghua University

Other Primary Investigator(s)

PI Affiliation
University of Arkansas
PI Affiliation
Tsinghua University
PI Affiliation
Peking Univerisity Third Hospital

Additional Trial Information

In development
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
We conduct a field experiment in a hospital to investigate the impact of information intervention for patients and families on their risky behaviors. We focus on families defined as high-risk pregnant women participating in Multi-discipline Treatment (MDT) and their companions. The families receive the information once before and four times after MDT. We manipulate 1) the content of information provided to pregnant women across treatments, including personalized disease information and emotional support, and 2) whether the additional information is provided to the companions. Additionally, we collect data on preferences and rationality scores of, and coordination level between the pregnant women and their companions before MDT. Our study also explores the role of these behavioral traits on pregnancy-related risky behavior.
External Link(s)

Registration Citation

Li, Sherry Xin et al. 2024. "Risk and Personalized Support for Patients and Families: A Field Experiment in a Major Chinese Hospital." AEA RCT Registry. April 02. https://doi.org/10.1257/rct.12301-1.0
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Risky decisions of the family measured by the non-compliance degree against physicians.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Both health outcomes of the pregnancy women and the newborn, and a series of answers in the follow-up surveys.
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We collaborate with a leading hospital in China to conduct a field experiment, involving high-risk pregnancy women participating in the Multi-discipline Treatment (MDT) and their companions (if any). Using a between-subject design, we vary the content and recipient of information at the family level, including pregnant women and their companions, across treatments before MDT. In the control group, both subjects in the family receive basic introduction about the hospital and MDT. In the treatment groups, pregnant women receive additional disease information related to them in Disease group or both disease information and emotional support in Emotion group. In Family group, pregnant women receive the same information as in Emotion group, while companions also receive additional disease and emotional information. To ensure exposure to the information, we send extra information based on assigned treatments every two weeks, for a total of four times after MDT. Moreover, we use a baseline survey to measure the degree of risk aversion, ambiguity aversion, rationality score of both subjects in the family, as well as the coordination level between them before the information intervention. Following each information distribution after MDT, we attach a survey to elicit subjects’ risk perception, emotion, and their coordination level to examine the potential mechanisms of our intervention.
Experimental Design Details
Not available
Randomization Method
Randomization is conduct by a computer. For each week, we randomly assign the new subjects into different groups to minimize the difference of balanced variables across groups.
Randomization Unit
Randomization unit is the family, including the high-risk pregnant woman and, at most, one of her companions (husband, mother or other relatives).
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
Around 320 families.
Sample size: planned number of observations
The unit of analysis is a family. Thus the planned number of observations is 320.
Sample size (or number of clusters) by treatment arms
We will have four groups (control, Diease, Emotion and Family), and each group contains 80 families.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Peking University Third Hospital Medical Science Research Ethics Committee
IRB Approval Date
IRB Approval Number