Patients in group 2 were less likely to undergo any invasive treatments ( relative risk , 0.44 ; 95 % CI , 0.27-0 .73 ) , have surgical excision only ( 0.45 ; 0.15-1 .38 ) , or undergo laser treatment only ( 0.44 ; 0.27-0 .78 ) compared with those in group 1 .