Geographical Distribution of Discontinued and Suspended Trials in 2024
Breakdown of Discontinued Trials Across Regions in 2024
According to the AdisInsight database, the USA had the highest number of trials discontinued in 2024, with 255 trials, followed by Spain (94 trials), France (79 trials), and Germany (70 trials). The primary reason for these suspensions was strategic decisions made by companies or sponsors. These decisions included modifications to the clinical development plan, withdrawal of the drug from clinical development, and the time required by sponsors to evaluate the trial's first phase.
Geographical distribution of discontinued trials in 2024

Fig 15: Regional distribution of discontinued trials in 2024
Breakdown of Suspended Trials Across Regions in 2024
At the same time, the USA also reported the highest number of suspended trials, with 138 trials, followed by Canada (14 trials), China (13 trials), and the United Kingdom (12 trials).
Geographical distribution of suspended trials in 2024

Fig 16: Regional distribution of suspended trials in 2024