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Table 4 Reasons for early termination of a trial

From: Adaptive designs undertaken in clinical research: a review of registered clinical trials

Reason Phase II Phase II/III Phase III
  Private Public Private Public Private Public
Poor recruitment 1 0 1 0 0 1
Efficacy 0 0 0 0 1 0
Futility 3 2 3 0 4 1
Safety 0 0 0 0 0 1
Financial 1 0 1 0 0 0
Other 0 0 0 0 1 0
All a 5 2 5 0 6 3
  1. aOnly trials terminated after enrolment included