Survey participant eligibility criteria and enrollment
Note: aIn some cases (N=165), contact was not initiated
because the target study enrollment was reached prior to placement of the first
call to these participants. bParticipants who were unavailable at
time of last contact fell into 5 categories: answering machine picked up the
call (N=99), call was answered but participant was not home
(N=23), call was never answered (N=16), telephone line was busy
(N=9), or call was answered by the participant who requested the survey
be administered at a later date/time (N=3).