Table 2.

Clinical decision support table3–7

Key featuresFever >37.8
Persistent cough
Contact with a known or suspected case within the last 14 daysLymphopenia
Thrombocytopenia (usually mild)
Raised CRP
Raised D-dimer
CXR: patchy ground glass opacities, typically predominantly peripheral and basal
Additional notesGI disturbance and other atypical presentations have been reported. It is important that all patients are directly questioned about new respiratory symptoms and fever, even if this is not their presenting complaint
The possibility of COVID-19 should be considered in elderly patients with non-specific signs/symptoms
Direct questioning about household or occupational exposure to individuals with febrile/respiratory illness is recommended
Consider local prevalence of COVID-19. As the epidemic unfolds, the index of suspicion of COVID-19 should be altered accordingly
Neutrophilia with a very high CRP should raise suspicion of bacterial infection rather COVID even though it does not necessarily exclude COVID-19X-ray changes may be bilateral or unilateral
Over time, patchy ground glass opacities may coalesce into denser consolidation
Pleural effusions, lymphadenopathy, cavitation or masses may point towards alternative diagnoses
Consider other diagnoses that may lead to ground glass changes.
  • CRP = C-reactive protein; CXR = chest radiograph.