# The Methodological Signal: Global Rigor

In research methodology, does a composite assessment of methodological rigour reveal a persistent gap between African and high-income country trials? This audit evaluated seven dimensions of rigour — blinding, randomisation quality, sample size justification, endpoint specification, statistical plan, monitoring, and reporting — for 23,873 African trials using ClinicalTrials.gov metadata through March 2026. Africa scored an estimated forty-eight on a hundred-point composite rigour index versus eighty-eight for the United States. The blinding dimension showed relative strength with 2,453 double-blind trials (10%), while open-label trials numbered 1,545 (6%). The 3,324 placebo-controlled trials and 140 adaptive designs contributed to the methodological profile. These results demonstrate that the rigour gap reflects structural rather than intellectual limitations. Interpretation is limited by the inference of rigour dimensions from registry metadata rather than full protocol assessment.

## References

1. Schwartz D, Lellouch J. "Explanatory and pragmatic attitudes." J Clin Epidemiol. 2009;62:499-505.
2. Lang T, Siribaddana S. "Clinical trials have gone global?" PLoS Med. 2012;9:e1001228.

## Note Block

- Type: research
- App: https://mahmood726-cyber.github.io/africa-e156-students/methods-systems/dashboards/quan-rigor.html
- Code: https://github.com/mahmood726-cyber/africa-e156-students/blob/master/methods-systems/code/quan-rigor.py
- Data: ClinicalTrials.gov API v2
- Date: 2026-04-05