Modifiable risk factors for occlusion included hand , antecubital fossa , or upper arm insertion compared with forearm ( hazard ratio [ HR ] , 1.47 [ 95 % confidence interval ( CI ) , 1.28-1 .68 ] , 1.27 [ 95 % CI , 1.08-1 .49 ] , and 1.25 [ 95 % CI , 1.04-1 .50 ] , respectively ) ; and for phlebitis , larger diameter PIVC ( HR , 1.48 [ 95 % CI , 1.08-2 .03 ] ) .