# Current landscape of dyslipidemia-related randomized clinical trials registered on the International Clinical Trials Registry Platform

## TL;DR

This study analyzes the characteristics of clinical trials on dyslipidemia to identify research gaps and improve trial design.

## Contribution

The study provides a comprehensive overview of dyslipidemia-related RCTs on the ICTRP, highlighting demographic and methodological trends.

## Key findings

- Most trials focused on adults with a median sample size of 93 and limited inclusion of younger participants or women.
- Medication was the most common intervention, and only 0.7% of trials prioritized treatment adherence as a primary outcome.
- The 7-year cumulative publication rate after enrollment was 20.8%, indicating a need for improved trial reporting.

## Abstract

This study elucidates the characteristics of randomized clinical trials (RCTs) related to dyslipidemia that are registered on the International Clinical Trials Registry Platform (ICTRP) to better identify research hotspots, address existing gaps, and improve clinical trial designs.

This cross-sectional study included dyslipidemia-related RCTs registered on the ICTRP up to 13 August 2024. We evaluated the relevant characteristics of these RCTs and reviewed their publication status after enrollment using PubMed.

A total of 2,410 dyslipidemia-related RCTs were analyzed. The number of registered RCTs sharply increased in 2005 (N = 125). The majority of the RCTs included adults (91.4%), with a median sample size of 93 (50–229), and 92.9% of these trials had no sex-based enrollment restrictions. Few RCTs focused on participants aged ≤18 years (2.8%), those aged 19–44 years (3.4%), or exclusively women (2.8%). Medication (83.1%) was the most common type of intervention. Efficacy and safety outcomes were predominant (81.5%), while only 0.7% of the RCTs specified treatment adherence as a primary outcome. The RCTs involving adults had larger sample sizes (median 100.0 [50, 245] vs. 56.0 [27, 108], p = 0.047) and lower proportions of natural medicine and extracts (26.6% vs. 33.6%, p < 0.001) compared to age-specific RCTs. After enrollment, the 7-year cumulative publication rate was 20.8%.

High-quality RCTs involving younger participants, women, and adherence-related outcomes were lacking. Researchers should prioritize exploring novel therapeutic strategies to improve trial publication rates.