A better rate in terms of surgical performance score was noted by the tutors when the study participants were using 3D vs 2D , for both PY ( 3.6 [ 0.8 ] vs 3.0 [ 0.4 ] ; P = .034 ) and PN ( 3.6 [ 0.51 ] vs 3.15 [ 0.63 ] ; P = .001 ) .