Table 3.

Results of the assessment of radiological signs of CTEPH in patients ultimately diagnosed with CTEPH versus those in whom CTEPH was ruled out after 2-year follow-up

	CTEPH diagnosis confirmed, n = 9 (n, %)	CTEPH ruled out, n = 332 (n, %)	Univariate analysis (OR, 95%CI)	Sensitivity (%, 95%CI)	Specificity (%, 95%CI)	PPV (%, 95%CI)	NPV (%, 95%CI)	Positive likelihood ratio (95%CI)	Negative likelihood ratio (95%CI)
Presence of ≥ 3 of 6 predictors of CTEPH	4 (44)	33 (10)	7.2 (1.9–28)	44 (14–79)	90 (86–93)	11 (5.2–21)	98 (97–99)	4.5 (2.0–9.9)	0.62 (0.34–1.1)
Overall judgment: CTEPH present	8 (89)	19 (5.7)	132 (16–1109)	89 (52–99.7)	94 (91–97)	30 (20–41)	99.7 (98–99.9)	16 (9.5–25)	0.12 (0.0–0.8)

Abbreviations: CTEPH, chronic thromboembolic pulmonary hypertension; OR, odds ratio; 95%CI, 95% confidence interval; PPV, positive predictive value; NPV, negative predictive value