---
title: A Longitudinal EMA Study (PACES)
description: The purpose of the Cannabis EMA Study is to examine factors that relate to cannabis use and cravings during pregnancy and postpartum.
---

[Butler Hospital Research Studies ](https://www.butler.org/studies)

# [A Longitudinal EMA Study (PACES)](https://www.butler.org/studies/paces-study)

 Written by [Butler Hospital](https://www.butler.org/studies/author/butler-hospital) | May 23, 2024

# A Longitudinal EMA Study Examining the Role of Maternal Mood and Physical Symptoms on Women’s Cannabis Use Across the Perinatal Period (a.k.a. PACES)

## What is the Cannabis EMA Study?

 The purpose of this study is to examine factors that relate to cannabis use and cravings during pregnancy and postpartum.  

## Why is the study important?

The purpose of our research study is to learn more about what factors are associated with cannabis cravings and use during pregnancy and postpartum.

## Who qualifies for the study?

 You may qualify for this study if you meet the following criteria:

- 18+ years old
- Up to 24 weeks pregnant
- Used cannabis at least twice weekly in the three months before pregnancy
- Own a smartphone

## What will I need to do if I qualify for the study?

 Once enrolled, this study involves:

- In-person baseline interview where, if eligible, we will ask you to download an app on your smartphone.
- Answering questions on the app several times a day, for a few days in a row, at different times during the study.
- Follow-up interviews when you are 24 and 34 weeks pregnant and 3 months postpartum. 

## Will I be paid for participating in this study? 

Participants enrolled between 14- and 20-weeks gestation will be compensated up to $745 for completing all assessments and responding to all prompts of from the app. Participants who enroll later will complete assessments and prompts from the app at only 3 timepoints and will be compensated up to $565.

**There is no cost to participate in the study.*

## How do I enroll in the study?

 To participate in the study:

- Call (401) 455-6303 to see if you are eligible.
- Participate in a brief call to determine a baseline assessment.

## Principal Investigators: 

- Cynthia L. Battle, PhD  
  Clinical psychologist and Professor of Psychiatry & Human Behavior   
  Brown University
- Ana Abrantes, Ph.D.   
  Professor, Department of Psychiatry and Human Behavior  
  Brown University  
  Co-director Behavioral Medicine and Addictions Research, director of psychology  
  Butler Hospital
- Michael Stein, MD  
  Internalist 
- Leslie Brick, Ph.D.   
  Assistant Professor of Psychiatry and Human Behavior  
  Brown University
- Jane Metrick, Ph.D  
  Professor of Behavioral and Social Sciences   
  Professor of Psychiatry and Human Behavior   
  Brown University
- Adam Lewkowitz, MD, MPHS  
  Assistant Professor in the Division of Maternal-Fetal Medicine  
  Brown University

[View full post](https://www.butler.org/studies/paces-study)

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