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. 2015 Jun 19;17(1):165. doi: 10.1186/s13075-015-0673-7

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© Nagel et al. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Correlation of systolic pulmonary arterial pressure (PASP) at 25 Watts and PASP at rest. Cutoff values are 45 mm Hg for PASP at 25 Watts and 40 mm Hg PASP at rest. Circles represent patients without pulmonary hypertension (PH) verified by right heart catheterisation (RHC); squares are patients with manifest associated pulmonary arterial hypertension according to RHC as gold standard. PASP at rest with a cutoff value of 40 mm Hg would have missed five manifest PH patients; PASP at 25 watts with a cutoff value of 45 mm Hg would have missed only one patient with a slightly lower specificity. CI confidence interval