. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: JAMA. 2012 Sep 26;308(12):1237–1245. doi: 10.1001/2012.jama.11274

Table 5.

Per-Patient Diagnostic Performance of FFR_CT ≤0.80 and CT ≥50% vs FFR ≤0.80 Among Patients With Intermediate CT Stenosis Severity (30%–70%)

	FFR_CT ≤0.80		CT >50%
	Estimate, % (95% CI)	No. of Patients in Group	Estimate, % (95% CI)	No. of Patients in Group
Accuracy	71 (61–80)	83	57 (46–67)	83

Sensitivity	82 (63–92)	27	37 (22–56)	27

Specificity	66 (53–77)	56	66 (53–77)	56

PPV	54 (39–68)	41	34 (20–53)	29

NPV	88 (75–95)	42	68 (55–79)	54

Abbreviations: CT, computed tomographic angiography; FFR_CT, fractional flow reserve calculated from CT; NPV, negative predictive value; PPV, positive predictive value.