Experts had a sensitivity of 100 % ( 95 % CI = 72 % to 100 % ) and specificity of 100 % ( 95 % CI = 77 % to 100 % ) on thin , and a sensitivity of 93 % ( 95 % CI = 66 % to 100 % ) and specificity of 100 % ( 95 % CI = 75 % to 100 % ) on obese cadavers .