Fig. 2From: Most patient conditions do not a priori debilitate the sensitivity of thoracic ultrasound in thoracic surgery-a prospective comparative studyForest plot of specificity of lung ultrasound in dependence of different covariates. Note that the central dot represents the observed specificity; the true specificity lies between the observed specificity and 1.0 since the reference test (X-ray) is imperfect itselfBack to article page