Mental health disorders affect an estimated 100 million Africans, but mental hea...
Africa Trials
145
US Trials
9,503
Gap Ratio
66x
Nations
54
Key Finding
Africa hosted 145 depression trials versus 9,503 in the United States, a 66-fold disparity in research investment.
Regional Comparison
Distribution Analysis
Inequality Profile
Temporal & Structural
Why It Matters
Mental health disorders affect an estimated 100 million Africans, but mental health trial investment is among the lowest of any disease category, reflecting persistent stigma and health system neglect.
The Evidence 129 words · target 156
In the burden-versus-investment landscape of African health research, does the distribution of depression trials across African nations reveal a systematic research gap? 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 Shannon entropy of trial allocation as the primary estimand using registry metadata for each nation. Africa hosted 145 depression trials (0.6% of its portfolio) compared to 9,503 in the United States, yielding a 0.0-fold disparity in per-population investment. Shannon entropy of the trial distribution was 2.46 bits, confirming substantial concentration beyond random variation. These results expose a fundamental mismatch between where disease burden falls and where research investment flows across Africa. Interpretation is limited by reliance on ClinicalTrials.gov alone, which may undercount locally registered African studies.
Sentence Structure
Question
In the burden-versus-investment landscape of African health research, does the distribution of depression trials across African nations reveal a systematic research gap?
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 Shannon entropy of trial allocation as the primary estimand using registry metadata for each nation.
Robustness
Africa hosted 145 depression trials (0.
Interpretation
6% of its portfolio) compared to 9,503 in the United States, yielding a 0.
Boundary
0-fold disparity in per-population investment.
Extra
Shannon entropy of the trial distribution was 2.
Extra
46 bits, confirming substantial concentration beyond random variation.
Extra
These results expose a fundamental mismatch between where disease burden falls and where research investment flows across Africa.
Extra
Interpretation is limited by reliance on ClinicalTrials.
Extra
gov alone, which may undercount locally registered African studies.