In full multivariable models , both late CUS and MRI , but not early CUS , remained independently associated with NDI or death ( MRI cerebellar lesions : odds ratio , 3.0 [ 95 % confidence interval : 1.3-6 .8 ] ; late CUS : odds ratio , 9.8 [ 95 % confidence interval : 2.8-35 ] ) , and significant gross motor impairment or death .