Positive likelihood ratios ranged from 0.15 ( 95 % CI : 0.01 , 2.87 ) to a high of 2.33 ( 95 % CI : 0.71 , 7.70 ) , and negative likelihood ratios ranged from 2.00 ( 95 % CI : 0.35 , 11.48 ) to a low of 0.50 ( 95 % CI : 0.03 , 8.10 ) .