RE: RE: clinical trial the guy is vice president oncology. may be they finished adding site and the process is in place. they only need to recrut all the patient now. i can find the cost per patient at around $40000 for p3a and p3b but nor the avrage number of patient per site. or let's say the what is the minimum number of site you need if you have 450 patients to enroll?only found that:General Patient Recruitment Information: Less than 1/3 of people who come in for a screening end up completing a clinical trial. Some participants never pass the eligibility criteria. Others drop out...or get too busy. You have the right to quit a trial at any time, for any reason-or no reason at all. (Getz, The Gift of Participation, 40) Out of all of the research sites in the United States, less than a 1/3 contain 70% of the valuable subjects. Therefore 70% of the research sites under-perform, and somewhere between 15%-20% never even enroll a single patient. (Pierre, "Recruitment and Retention". 2006) Fifty percent of clinical research sites enroll one or no patients in their studies. (Pierre, "Recruitment and Retention". 2006) In an analysis of 25,855 study volunteers in the United States 73.2% of participants completed Overall clinical trials (Phases I-IV), 75.4% completed Phase I clinical trials, 69.7% completed Phase II/III clinical trials and 93.8% completed Phase IV clinical trials. (CenterWatch, 2003) Recent studies show that enrollment rates have dropped from 75% in 2000 to 59% in 2006 and retention rates have fallen from 69% to 48% during same period. (Getz, "Public Confidence") Surveys have shown a trend toward poor volunteer retention in studies, because overall one out of every four stick with a study until its completion. Most participants dropout during phases II and III. (CenterWatch, 2005)https://www.ciscrp.org/professional/facts_pat.html