“…Another important aspect of efficacious CT screening is the adherence to CT screening protocols, particularly to timely follow-up of positive scans ( Montes et al, 2007 , Cattaneo et al, 2018 , Hirsch et al, 2019 , Tanner et al, 2020 , Lopez-Olivo et al, 2020 ). Overall adherence to annual CT screening has been reported to be between 37 and 65% ( Montes et al, 2007 , Cattaneo et al, 2018 , Hirsch et al, 2019 , Tanner et al, 2020 , Lopez-Olivo et al, 2020 , Patel et al, 2012 , Young and Hopkins, 2012 , Young and Hopkins, 2013 , Young and Hopkins, 2013 , Young and Hopkins, 2014 , Griffiths et al, 2012 , Silvestri et al, 2007 , Kim et al, 2008 , Schnoll et al, 2003 , Hahn et al, 2006 , McCaul et al, 1996 , Bloss et al, 2011 , Weinstein et al, 2005 , Nichols et al, 2017 , Senft et al, 2019 , Spiro, 2007 , Park et al, 2013 , Breen et al, 2007 , Swan et al, 2000 , Spitz et al, 2007 , Spitz et al, 2009 , Cassidy et al, 2008 , Tammemägi et al, 2013 , Tammemagi et al, 2011 , Tammemagi et al, 2011 , Kovalchik et al, 2013 , Bach and Gould, 2012 , Lam et al, 2015 , Young et al, 2009aaaaaaa , Young et al, 2009bbbbbbb , Young et al, 2011cccc , Young et al, 2010dcdcd , Young et al, 2014eee , Young et al, 2013 , Young et al, 2010 , International Early Lung Cancer Action Programme, 2006 , Claassen et al, 2010 , Chowdhury et al, 2013 , West and Sohal, 2006 , Hopkins et al, 2011 , Hopkins et al, 2012 ) and contrasts with the adherence rates reported in the trial setting of NLST where over 95% of screening participants complied with ...…”