Cross-border trial networks in Africa are dominated by disease-specific consorti...
Africa Trials
1,250
US Trials
22,280
Gap Ratio
18x
Nations
54
Key Finding
Africa hosts 23,873 trials across 54 nations with extreme geographic concentration.
Regional Comparison
Distribution Analysis
Inequality Profile
Temporal & Structural
Why It Matters
Cross-border trial networks in Africa are dominated by disease-specific consortia (EDCTP, EANETT) rather than sovereign African regulatory frameworks, meaning collaboration structures reflect donor priorities.
The Evidence 125 words · target 156
In the spatial mapping of African clinical research, does the pattern of cross-border trial networks reveal structural inequity in African research investment? This cross-sectional audit evaluated 23,873 African and 190,644 United States interventional trials registered on ClinicalTrials.gov through April 2026. Investigators computed the network degree centrality as the primary estimand using registry metadata for each nation. Africa registered 1,250 relevant trials compared to 22,280 in the United States, revealing an 18-fold absolute gap in research volume. Shannon entropy of the trial distribution was 2.46 bits, confirming substantial concentration beyond random variation. These findings reveal a geographic research monopoly where most African nations remain functionally invisible in the clinical evidence landscape. Interpretation is limited by reliance on ClinicalTrials.gov alone, which may undercount locally registered African studies.
Sentence Structure
Question
In the spatial mapping of African clinical research, does the pattern of cross-border trial networks reveal structural inequity in African research investment?
Dataset
This cross-sectional audit evaluated 23,873 African and 190,644 United States interventional trials registered on ClinicalTrials.
Method
gov through April 2026.
Primary Result
Investigators computed the network degree centrality as the primary estimand using registry metadata for each nation.
Robustness
Africa registered 1,250 relevant trials compared to 22,280 in the United States, revealing an 18-fold absolute gap in research volume.
Interpretation
Shannon entropy of the trial distribution was 2.
Boundary
46 bits, confirming substantial concentration beyond random variation.
Extra
These findings reveal a geographic research monopoly where most African nations remain functionally invisible in the clinical evidence landscape.
Extra
Interpretation is limited by reliance on ClinicalTrials.
Extra
gov alone, which may undercount locally registered African studies.