Postocclusive Hyperemia Measured with Laser Doppler Flowmetry and Transcutaneous Oxygen Tension in the Diagnosis of Primary Raynaud’s Phenomenon: A Prospective, Controlled Study

Table 2

Sensitivity and specificity of the diagnostic tests.

	Cut-off value	Sensitivity	95% CI	Specificity	95% CI	PPV	95% CI	NPV	95% CI
bMBF	≤19.3 PU	79%	69.7–86.5	66%	55.8–75.2	69.9%	60.6–78.2	75.9%	65.5–84.4
TcPO2	≤62.6 mmHg	77%	67.5–84.8	64%	53.8–73.4	68.1%	58.8–76.6	73.6%	63.0–82.5
tpMBF	>7.2 seconds	79%	69.7–86.5	90%	82.4–95.1	88.8%	80.3–94.5	81.1%	72.6–87.9

PPV: positive predictive value; NPV: negative predictive value; 95% CI: 95% confidence interval.