Table 2.

Diagnostic accuracy of low dose and full protocol dobutamine echocardiography in predicting recovery of segmental resting function six months after revascularisation in patients taking β blockers

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
Low dose	47 (34/72)	81 (70/86)	68 (34/50)	65 (70/108)	66 (104/158)
95% CI	35 to 59	73 to 89	55 to 81	55 to 75	59 to 73
Full protocol	81 (58/72)	76 (65/86)	73 (58/79)	82 (65/79)	78 (123/158)
95% CI	72 to 90	67 to 85	63 to 83	74 to 90	72 to 84
p Value	<0.001	NS	NS	<0.05	<0.001

CI, confidence interval; NPV, negative predictive value PPV, positive predictive value.