Fig. 1
From: Focused cardiac ultrasound by unselected residents—the challenges
For each of the four categories defined to study diagnostic usefulness we have depicted the concordance (boxes equally marked) or discordance (boxes not equally marked) of diagnoses set pre-FoCUS, post-FoCUS and at discharge. In category 1 and 2, no diagnostic usefulness is observed as pre-FoCUS diagnosis is not changed. In category 3, diagnosis is changed correctly on the basis of a FoCUS examination. Finally, in category 4 the diagnosis is erroneously changed from the correct pre-FoCUS diagnosis