Areas under the curve were as follows ( CIs in parentheses ) : cardiac troponin I ( cTnI ) Stratus CS 0.94 ( 0.90 to 0.98 ) , cTnI Beckmann 0.92 ( 0.88 to 0.96 ) , cTnI Siemens ultra 0.90 ( 0.85 to 0.95 ) , cardiac troponin T high sensitivity 0.92 ( 0.88 to 0.96 ) , HFABP 1 0.84 ( 0.77 to 0.90 ) copeptin 0.62 ( 0.57 to 0.68 ) .