E156 Micro-Paper · Africa Clinical Trials

Patient-Reported Outcomes Gap

Patient-reported outcomes capture what matters to patients, but most PRO instrum...

Africa Trials
923
US Trials
31,383
Gap Ratio
34x
Nations
54
Key Finding
Africa hosts 23,873 trials across 54 nations with extreme geographic concentration.
Regional Comparison
No data
Patient-Reported Outcomes Gap by Country Egypt: 11752 Algeria: N/A Morocco: 162 Tunisia: 540 Senegal: N/A Ghana: 261 Nigeria: 379 Cameroon: N/A DRC: N/A Ethiopia: 302 Kenya: 788 Uganda: 809 Tanzania: 460 Rwanda: N/A South Africa: 3654 Egy 11752 Sou 3654 Uga 809 Ken 788 Tun 540 162 11752
Distribution Analysis
Regional Comparison Africa US Europe 0 10000 20000 30000
Contribution Breakdown 11752 Egypt 3654 South Afri 809 Uganda 788 Kenya 540 Tunisia 2814 Others
Inequality Profile
Enrollment Distribution Africa Reference 5000 10000 15000
Research Profile Volume Growth Phase3 Complete Diversity
Temporal & Structural
Growth 2010-2026 Before After Africa 0 0 US 0 0 Europe 0 0
Phase Distribution Africa US Europe Phase 1 3 32.5 17.7 Phase 2 30 297.8 241.9 Phase 3 67 631.8 444.2 Phase 4 49 657.9 202.6 657.9 3
Why It Matters

Patient-reported outcomes capture what matters to patients, but most PRO instruments are developed and validated in English-speaking, high-income populations and may not be culturally appropriate for African contexts.

The Evidence   133 words · target 156
In the methodological architecture of African clinical research, does the pattern of patient-reported outcomes gap 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 rate ratio comparing Africa to other regions as the primary estimand using registry metadata for each nation. Africa registered 923 relevant trials compared to 31,383 in the United States, revealing an 34-fold absolute gap in research volume. Temporal analysis showed 17.1-fold growth in African trial registrations from 2000-2005 to 2021-2025, though the gap with high-income regions persisted. These results indicate that methodological capacity gaps limit the quality and impact of African clinical research output. Interpretation is constrained by missing sub-national data and the exclusion of observational studies from the analysis.
Sentence Structure
Question

In the methodological architecture of African clinical research, does the pattern of patient-reported outcomes gap 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 rate ratio comparing Africa to other regions as the primary estimand using registry metadata for each nation.

Robustness

Africa registered 923 relevant trials compared to 31,383 in the United States, revealing an 34-fold absolute gap in research volume.

Interpretation

Temporal analysis showed 17.

Boundary

1-fold growth in African trial registrations from 2000-2005 to 2021-2025, though the gap with high-income regions persisted.

Extra

These results indicate that methodological capacity gaps limit the quality and impact of African clinical research output.

Extra

Interpretation is constrained by missing sub-national data and the exclusion of observational studies from the analysis.

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