1.2. Implications of the First Pilot Study for the Proposed Project
The pilot study provided us with the opportunity to learn
from methodological difficulties [13]. Although the
transfer and pilot testing of the German PRO-Self
© Plus PCP was quite successful and the feasibility of research
and intervention procedures was established, a number of
aspects warrant critical consideration. A low response
rate indicates that the invitation to participate needs to be
more closely linked to clinical practice. A high attrition
rate (18% in six weeks; 35% in 22 weeks) may be
inevitable and should be considered for sample size calculations.