Active Monitoring and Counseling Improve Retention in Obstetric Clinical Trials: Study

Preeclampsia affects approximately 2 to 8 percent of gestations globally, and while previous research supported by the World Health Organization (WHO) confirms that initiating low-dose aspirin early in pregnancy reduces preeclampsia risk, controversy over the optimal dose between 75 milligrams and 150 milligrams persists. To resolve this clinical gap, Dr. Abhishek Lachyan and colleagues from the Department of Obstetrics and Gynaecology at Vardhman Mahavir Medical College (VMMC) and Safdarjung Hospital, New Delhi, aimed to identify and document the complex operational challenges and implementation barriers encountered in their ongoing randomized, double-blind clinical trial evaluating these two regimens in high-risk pregnant women.

Therefore, the registered, double-blind trial at an Indian teaching hospital compares daily doses of 75 milligrams and 150 milligrams of aspirin in high-risk pregnant women (11 to 13 weeks plus 6 days of gestation) until 36 weeks or delivery. While tracking recruitment, compliance, and retention barriers, the study excludes patients with aspirin hypersensitivity, bleeding or platelet disorders, and severe kidney or liver disease.

Key Clinical Findings of the Study Includes:

• Recruitment Obstacles: The study reveals limited patient awareness of preeclampsia and anxieties regarding fetal drug safety hindered initial clinical enrollment.
• Adherence Deterrents: The trial highlights that daily medication compliance was frequently undermined by maternal forgetfulness, travel disruptions, and misconceptions about long-term aspirin safety.
• Administrative Demands: Researchers noted intensive paperwork requirements and iterative institutional review board submissions significantly increased overall administrative workloads.
• Data Vulnerabilities: Investigators reported high patient clinical volumes and missed scheduled visits occasionally led to incomplete case record forms and delayed data entry.
• Participant Attrition: The trial reported a follow-up loss of 8.2 percent, which compares favorably to the 5 to 15 percent attrition rate typical of similar maternal health investigations.

The results suggest that implementing proactive measures, such as structured clinical counseling, active telephone reminders, and flexible clinic scheduling, can successfully overcome major execution barriers and maintain high data integrity in obstetric research. Furthermore, managing the recorded 8.2 percent loss-to-follow-up rate emphasizes that continuous, empathetic participant engagement is vital for optimizing clinical trial retention during long-term maternal interventions.

Thus, the study concludes that clinicians are encouraged to integrate proactive patient education, systematic telephone follow-ups, and structured counseling into routine antenatal care to enhance treatment adherence, alleviate safety anxieties, and minimize patient drop-outs during critical pregnancy-related interventions.

While the single-center descriptive study may not be fully generalizable to settings with different resources, future research exploring multicenter designs and digital health monitoring tools remains highly desirable to establish standardized, highly reproducible operational models for obstetric clinical trials.

Reference

Lachyan A, Saxena U, Kapoor G, Yadav RK, Raj P, Prasad S, Singh N, Agarwal V. Operational Challenges and Implementation Barriers in Conducting a Randomized Double-Blind Clinical Trial on Aspirin for the Prevention of Preterm Preeclampsia in High-Risk Pregnancies: Experience from a Tertiary Care Teaching Hospital. Indian Obstetrics & Gynaecology. 2026;16(2):14-18.