Highly sensitive troponin I assay in the diagnosis of coronary artery disease in patients with suspected stable angina

Table 2 uscTnI values by patient subgroup according further testing following clinical review

Subgroup	uscTnI ng/L (minimum value)	uscTnI ng/L (average value)	uscTnI ng/L (maximum value)	n	P value
Referred back to the community practitioner (non-cardiac chest pain)	0.71	2.9	17	30
Exercise test	0.97	2.6	9.7	13
24 h ECG	1.9	2.3	2.6	2
Diagnosed angina, treated with medication	1.8	5.0	9.2	6
Advised further review by specialist cardiologist	1.0	12	70	7
Lost to follow up	0.8	2.6	7.5	18
Previously diagnosed with cardiac problems and under the care of a cardiologist	1.5	7.2	33.2	7
Echo (normal)	0.46	3.0	8.6	19
Echo (mild abnormalities)	2.47	6.44	17.0	6
Stress echo (negative)	0.98	2.1	3.9	13
Stress echo(positive)	3.1	3.1	3.1	1
CCTA (negative)	0.58	2.8	9.3	12	NS
CCTA (positive)	1.1	2.7	8.7	10
Angiogram(negative)	1.1	1.8	2.2	6	< 0.05
Angiogram(positive)	0.94	7.3	49	17

ECG: Electrocardiogram; CCTA: Coronary computed tomography angiography; NS: Not significant.