Table 2 Comparison of cardiac magnetic resonance imaging and exercise tolerance testing for detecting significant coronary artery disease on x ray angiography and on revascularisation

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Diagnostic accuracy (%)
Significant coronary stenosis
CMR	86%*	100%*	80%	60%*	89%*
ETT	48%*	50%*	82%	17%*	49%*

Revascularisation
CMR	94%*	53%	65%	90%*	74%
ETT	56%*	59%	50%	56%*	57%

*p<0.05 for comparison between CMR and ETT.
CMR, cardiac magnetic resonance; ETT, exercise tolerance test; NPV, negative predictive value; PPV, positive predictive value.