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Effectiveness of Two Aspirin Doses for Prevention of Hypertensive Disorders of Pregnancy: ASPIRIN TRIAL | Clinical Trials | Clareo Health

RECRUITINGPHASE4

Effectiveness of Two Aspirin Doses for Prevention of Hypertensive Disorders of Pregnancy: ASPIRIN TRIAL

Comparative Effectiveness of Two Aspirin Doses for Prevention of Hypertensive Disorders of Pregnancy: ASPIRIN TRIAL

NCT06468202•Ohio State University

View on ClinicalTrials.gov

Summary

The overall goal of this large, pragmatic, comparative effectiveness trial is to test the hypothesis that among at-risk individuals, 162 mg/day aspirin is superior to 81 mg/day in preventing Hypertensive disorders of pregnancy (HDP), and that there are multiple factors associated with adherence with aspirin therapy that will be important to identify to enable optimal implementation of study findings and population-level benefits.

Detailed Description

Hypertensive disorders of pregnancy (HDP), such as preeclampsia (PE) and gestational hypertension (gHTN), occur in \~15% of pregnant individuals, disproportionately affect self-identified non-Hispanic Black individuals (with the understanding that race is a socially defined construct and the inequity is related to social determinants of health), are increasing in frequency, and are associated with short- and long-term maternal and neonatal morbidities and mortality. There are currently no available therapeutics to treat individuals with HDP; thus, developing interventions for the prevention of HDP is of substantial public health significance. The U.S. Preventive Services Task Force (USPSTF) and other professional societies recommend or endorse the use of aspirin for prevention of HDP in individuals at high or moderate risk. However, there is great uncertainty regarding optimal dosing, whether there is heterogeneity of effectiveness of aspirin in reducing the risk of HDP among different populations, and what factors are associated with adherence. The overall goal of this large, pragmatic, comparative effectiveness trial is to test the hypothesis that among at-risk individuals, 162 mg/day aspirin is superior to 81 mg/day in preventing HDP, and that there are multiple factors associated with adherence with aspirin therapy that will be important to identify to enable optimal implementation of study findings and population-level benefits. The trial will achieve the following specific aims: Specific Aim 1: To compare the frequency of HDP (primary outcome), as well as other important secondary outcomes (gHTN, PE, preterm PE, PE-related adverse outcomes, aspirin-related safety outcomes, and patient-reported outcomes related to maternal health, pregnancy, and childbirth experiences) between the two aspirin treatment arms. Specific Aim 2: To compare the gestational age at birth and the frequency of adverse perinatal outcomes (preterm birth, perinatal death, small-for-gestational-age birth, neonatal intensive care unit admission, and complications of prematurity), as well as patient-reported outcomes related to maternal-infant bonding between the two aspirin treatment arms. Specific Aim 3: To use quantitative and qualitative analyses to elucidate facilitators and barriers associated with adherence to aspirin therapy in at-risk individuals during pregnancy in order to facilitate future implementation.

Eligibility

Age

14 - 35 years

Sex

FEMALE

Healthy Volunteers

Inclusion Criteria

•1. live intrauterine gestation ≤16 6/7 weeks gestational age based on best clinical obstetric estimate,
•2. age 14 years or older and able to provide informed consent,
•3. at least one of the following high-risk criteria: i) any prior pregnancy complicated by preeclampsia ii) current pregnancy complicated by chronic hypertension diagnosed before randomization (ACOG) iii) pre-gestational diabetes (on medication for diabetes prior to pregnancy, or diabetes is diagnosed prior to randomization with hemoglobin A1C of 6.5% or greater or abnormal 3-hour glucose tolerance test) iv) twin gestation (including higher order pregnancy reduced to twins prior to 14 weeks) v) chronic kidney disease vi) autoimmune disease (e.g., antiphospholipid syndrome, systemic lupus erythematous)
•4. or two or more moderate-risk criteria for HDP (per USPSTF), i) nulliparity (no prior delivery at or after 20 weeks 0 days of gestation) ii) obesity (body mass index ≥30 kg/m2 at time of randomization) iii) age ≥35 years (at time of expected estimated due date) iv) Black race v) low income vi) personal risk factors (previous pregnancy with low birth weight or SGA infant, previous adverse pregnancy outcome \[unexplained stillbirth\], placental abruption, interval \>10 years between pregnancies) vii) Family history of preeclampsia (i.e., mother or sister) viii) In vitro fertilization
•5. patient not currently on aspirin OR patient on aspirin for obstetrical indications (e.g., related to IVF, or HDP) and: i- randomized before 130/7 weeks gestation, or ii- randomized on or after 13 0/7 weeks gestation and started aspirin within 2 weeks prior to randomization (e.g., aspirin started for HDP prevention at 12 0/7 weeks and patient randomized at 13 2/7 weeks).

Exclusion Criteria

•1. known allergy or hypersensitivity to aspirin or any medical condition where aspirin is contraindicated (e.g., active peptic ulcer disease, nasal polyps, NSAID-induced asthma, active gastrointestinal bleeding, known G6PD deficiency, severe hepatic dysfunction, bleeding disorders, history of bariatric surgery),
•2. current or planned aspirin use in pregnancy for non-obstetrical indication (e.g., prior stroke/prior myocardial infraction),
•3. age \< 14 years,
•4. involuntarily confined or detained,
•5. considered as having a diminished decision-making capacity,
•6. obstetrical ultrasound suspicious for major congenital abnormality, known or suspected fetal aneuploidy, fetal demise, or planned pregnancy termination,
•7. participation in another trial that affects the primary outcome, without prior approval of the PI,
•8. plan to deliver at an outside participating site with inability to obtain medical records,
•9. monoamniotic twin gestation because of the risk of fetal demise and preterm delivery,
•10. participation in this trial in prior pregnancy,
+1 more criteria

Locations (16)

University of Alabama at Birmingham

Birmingham, Alabama, United States

Cedars Sinai Medical Center

Los Angeles, California, United States

University of California, San Francisco

San Francisco, California, United States

Northwestern University

Chicago, Illinois, United States

University of Mississippi

Jackson, Mississippi, United States

University of New Mexico

Albuquerque, New Mexico, United States

Columbia University

New York, New York, United States

University of North Carolina, Chapel Hill

Chapel Hill, North Carolina, United States

The Ohio State University Wexner Medical Center OB/GYN Maternal and Fetal Medicine

Columbus, Ohio, United States

University of Pittsburg Magee

Pittsburgh, Pennsylvania, United States

Key Dates

Start Date

October 18, 2024

Primary Completion Date

January 1, 2029

Completion Date

February 1, 2030

Last Updated

December 24, 2025

Enrollment

10,742

ESTIMATED participants

Conditions

Hypertensive Disorders of PregnancyPreeclampsiaGestational Hypertension

Interventions

Aspirin 81 mg

DRUG

Aspirin 162 mg

DRUG

Contacts

Maged Costantine, MD, MBA

CONTACT

614-293-2222 Maged.Costantine@osumc.edu

Kara Rood, MD

CONTACT

614-293-8045 Kara.Rood@osumc.edu

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Data Source & Attribution

This clinical trial information is sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

ClinicalTrials.gov last update: December 24, 2025Data synced to Clareo: March 29, 2026

Modifications: This data has been reformatted for display purposes. Eligibility criteria have been parsed into inclusion/exclusion sections. Location data has been geocoded to enable distance-based search. For the authoritative and most current information, please visit ClinicalTrials.gov.

Neither the United States Government nor Clareo Health make any warranties regarding the data. Check ClinicalTrials.gov frequently for updates.

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Effectiveness of Two Aspirin Doses for Prevention of Hypertensive Disorders of Pregnancy: ASPIRIN TRIAL

Inclusion Criteria

Exclusion Criteria

Prevention of Preeclampsia in Denmark: A National Implementation Study

Vascular Effects of High-Salt After Preeclampsia

Multiparametric Assessment of Maternal Vascular Function in the Prediction of Hypertensive Disorders of Pregnancy

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