Of the 3,482 veterans in the sampling frame who were scheduled for a primary care appointment during the study period , 1,990 ( 57.2 % ) were seen in the clinic and screened by the PCP ; moderate-intensity PA was deemed safe for 1,293 ( 37.1 % ) , 871 ( 25.0 % ) agreed to be contacted for further screening , 334 ( 9.6 % ) were eligible for the study , and 232 ( 6.7 % ) enrolled .