Slipped deadlines and sample size shortfalls in a random sample of research studies (2008-05-07 with a major update on 2008-06-30)

There is a limited amount of data out there that suggests that many researchers overpromise on the planned sample size and completion date and underdeliver. For example,

• "Globally, more than 80 per cent of clinical trials fail to enrol on time, and this recruitment problem is extremely costly for drug companies, contributing to 85-95 per cent of the lost days in a clinical trial." www.in-pharmatechnologist.com/news/ng.asp?n=68150-chiltern-india-cost-clinical-trial-regulatory.

This webpage was originally published at the StATS website, which is currently unavailable. There is a dispute about the ownership of these pages, so I am only able to include a brief excerpt from this page.

This work is licensed under a Creative Commons Attribution 3.0 United States License. This page was written by Steve Simon and was last modified on 2008-11-10. Need more information? I have a page with general help resources. You can also browse for pages similar to this one at Category: Accrual problems in clinical trials.