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The persistent exclusion of older patients from ongoing clinical trials regarding heart failure
Antonio Cherubini1, Joaquim Oristrell, Xavier Pla
1Institute of Gerontology and Geriatrics, Department of Clinical and Experimental Medicine, Policlinico Santa Maria della Misericordia, University of Perugia Medical School, Piazzale Menghini 1, 06156 Perugia PG, Italy. acherub@unipg.it
Insights
Older adults are frequently excluded from heart failure clinical trials due to arbitrary age limits or poorly justified criteria. This widespread exclusion limits the generalizability of research findings for this demographic.
Area of Science:
- Cardiology
- Clinical Trials
- Geriatrics
Background:
- Clinical research often underrepresents elderly patients, particularly in studies for conditions prevalent in older populations like heart failure.
- This study addresses the gap in understanding the exclusion of older individuals in ongoing heart failure clinical trials.
Purpose of the Study:
- To investigate the extent of exclusion of older individuals in ongoing heart failure clinical trials.
- To identify specific exclusion criteria contributing to limited recruitment of elderly patients.
Main Methods:
- Data from ongoing heart failure clinical trials were extracted from the World Health Organization Clinical Trials Registry Platform.
- Exclusion criteria were analyzed, categorizing them as arbitrary upper age limits or other potentially limiting factors, and further classified as justified or poorly justified.
Main Results:
- Over a quarter of heart failure trials (25.5%) imposed arbitrary age limits.
- Poorly justified exclusion criteria were present in 43.4% of trials, potentially limiting older adult inclusion.
- Exclusionary practices were more prevalent in trials within the European Union and those sponsored by public institutions.
Conclusions:
- Despite regulatory recommendations, older individuals remain widely excluded from heart failure clinical trials.
- The findings highlight a persistent issue in clinical trial design that needs to be addressed to improve representation of the elderly.
Background:
Much clinical research of relevance to elderly patients examines individuals who are younger than those who have the disease in question. A good example is heart failure. Therefore, we investigated the extent of exclusion of older individuals in ongoing clinical trials regarding heart failure.
Methods:
In the context of the Increasing the PaRticipation of the ElDerly in Clinical Trials (PREDICT) study, data from ongoing clinical trials regarding heart failure were extracted from the World Health Organization Clinical Trials Registry Platform on December 1, 2008. Main outcome measures were the proportion of trials excluding patients by an arbitrary upper age limit or by other exclusion criteria that might indirectly cause limited recruitment of older individuals. We classified exclusion criteria into 2 categories: justified or poorly justified.
Results:
Among 251 trials investigating treatments for heart failure, 64 (25.5%) excluded patients by an arbitrary upper age limit. Such exclusion was significantly more common in trials conducted in the European Union than in the United States (31/96 [32.3%] vs 17/105 [16.2%]; P = .007) and in drug trials sponsored by public institutions vs those by private entities (21/59 [35.6%] vs 5/36 [13.9%]; P = .02). Overall, 109 trials (43.4%) on heart failure had 1 or more poorly justified exclusion criteria that could limit the inclusion of older individuals. A similar proportion of clinical trials with poorly justified exclusion criteria was found in pharmacologic and nonpharmacologic trials.
Conclusion:
Despite the recommendations of national and international regulatory agencies, exclusion of older individuals from ongoing trials regarding heart failure continues to be widespread.
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