Table 1.

Sensitivity, specificity, PPV, LR+, LR− and NPV with 95% confidence interval for highest levels of D-dimer (mcg/L) at different cut-off points for prediction pulmonary embolism in patients with COVID-19 during hospitalization.

D-dimer cut-off	Sensitivity	LR+	PPV	Specificity	LR−	NPV
2000	1.00 (1.00–1.00)	1.79 (1.26–2.53)	0.60 (0.44–0.76)	0.44 (0.25–0.63)	0.00	1.00 (1.00–1.00)
3000	0.90 (0.77–1.00)	1.88 (1.22–2.89)	0.60 (0.42–0.78)	0.52 (0.32–0.72)	0.19 (0.05–0.75)	0.87 (0.69–1.00)
5000	0.76 (0.58–0.94)	1.90 (1.11–3.26)	0.62 (0.43–0.80)	0.60 (0.41–0.79)	0.40 (0.17–0.91)	0.75 (0.56–0.94)
10,000	0.57 (0.36–0.78)	2.38 (1.08–5.25)	0.67 (0.45–0.88)	0.76 (0.59–0.93)	0.56 (0.32–0.99)	0.68 (0.51–0.85)
15,000	0.48 (0.26–0.69)	2.98 (1.09–8.18)	0.71 (0.48–0.95)	0.84 (0.70–0.98)	0.62 (0.39–1.00)	0.66 (0.49–0.82)
30,000	0.26 (0.08–0.44)	3.78 (0.84–17.02)	0.75 (0.45–1.00)	0.93 (0.84–1.00)	0.79 (0.58–1.00)	0.61 (0.47–0.76)

Definition of abbreviations: LR+, positive likelihood ratio; LR−, negative likelihood ratio; PPV, positive predicted value; NPV, negative predicted value.