Of the 41,219 potential participants, one-quarter of the eligible population (n = 11,114) was invited for AUS screening between October 2008 and December 2010 based on the invitation scheme described above because of the limited clinical capacity of ultrasonography.
The cluster size is estimated based on the number of invitations for the yearly influenza vaccination per practice.
The GPs were divided into three groups based on the order of the invitation list made by the booking secretariat from 1 February 2009 to 31 October 2009.
Based on this invitation, a pilot project was implemented at our institution in previous semesters, with the participation of the Nutrition course.
The general approach will be to include 4 to 6 health centres in each region based on the response to an invitation for expressions of interest in being involved in this qualitative component of the work.
Invitations, based on the data from the Estonian Population Registry, were sent to women born in 1955 , 1960 , 19651970 , 1975 and 1985.
We invited the subjects to have an AUS performed by prioritizing invitations based on the risk score calculated above with a phased in approach.
