This excerpt taken from the ADLR 10-K filed Mar 1, 2005.
Patients may discontinue their participation in our clinical studies, which may negatively impact the results of these studies, and extend the timeline for completion of our development programs.
The time required to complete clinical trails is dependent upon, among other factors, the rate of patient enrollment. Patient enrollment is a function of many factors, including:
We are subject to the risk that patients enrolled in our clinical studies may discontinue their participation at any time during the study as a result of a number of factors, including, withdrawing their consent or experiencing adverse clinical events which may or may not be related to our product candidates under evaluation. We are subject to the risk that if a large number of patients in any one of our studies discontinue their participation in the study, the results from that study may not be positive or may not support an NDA for regulatory approval of our product candidates.
In clinical study POI 14CL302, discontinuation rates were 21%, 16%, and 27% in the placebo group, 6 mg dose group and 12 mg dose group, respectively. This resulted in fewer efficacy evaluable patients in the placebo and 12 mg treatment groups compared to the 6 mg treatment group. Following the analysis of study POI 14CL302, we increased enrollment in studies POI 14CL313 and POI 14CL308, with the objective of potentially increasing the number of efficacy evaluable patients in each dose group in our ongoing studies. These enrollment increases have extended the timeline for completion of our POI development program. In study POI 14CL313 discontinuation rates were 30%, 23% and 19% in the placebo, 6 mg and 12 mg dose groups, respectively. In study POI 14CL308 discontinuation rates were 13%, 14% and 14% in the placebo, 6 mg and 12 mg treatment groups, respectively.