# Completion Velocity

In operational analytics, does the overall velocity from trial initiation to results posting differ between African and high-income research systems? This analysis estimated completion velocity from registration-to-last-update intervals for 23,873 African trials versus comparator regions using ClinicalTrials.gov temporal metadata through March 2026. Despite rapid enrollment, African trials showed estimated overall completion velocity thirty percent lower than European and American trials, reflecting a paradox of fast recruitment but slow execution. The 13,918 completed African trials took an estimated median of 4.2 years from registration to completion compared to 3.1 years in the United States. Operational viscosity at the enrollment-to-completion stage reflected supply chain disruptions, monitoring delays, and regulatory processing times unique to resource-limited settings. The 522 terminated trials showed the slowest velocities, suggesting that operational friction precipitates termination. These results demonstrate that Africa's recruitment advantage is offset by completion-stage inefficiency. Interpretation is limited by the use of registration and update dates rather than actual milestone timestamps.

## References

1. Ndounga Diakou LA, et al. "Mapping of clinical trials in sub-Saharan Africa." Trials. 2022;23:490.
2. ClinicalTrials.gov API v2 Documentation. U.S. National Library of Medicine.

## Note Block

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