text_1: High-sensitivity cardiac troponin T (HSCT-T) dosage may not be diagnostic if the onset of symptoms occurs less than 3 hours before acute myocardial injury (AMI).
text_2: This means that if 21 of 100 consecutive patients have the target condition (21%, the median prevalence across the studies), 2 (95% confidence interval 2 to 3) of 21 patients with acute myocardial infarction will be missed (false negatives) if 14 ng/L is used as a cut-off value and 18 (13 to 25) of 79 patients without acute myocardial infarction will test positive (false positives).