Prior CRCS ( OR 2.64 , 95 % CI 1.99-3 .52 ) and intervention group ( Automated : OR 2.06 95 % CI 1.43-2 .95 ; Assisted : OR 4.03 , 95 % CI 2.69-6 .03 ; Navigated : OR 5.64 , 95 % CI 3.74-8 .49 ) were predictors of CRCS completion at Year 1 .