Why most #radiology evidences about the use of CT during COVID19 pandemics are not clinically impactful (1/3):

Radiology is just one aspect of patient management !
Selection bias +++
Blurry cohort description
Retrospective studies
Emergency setting data quality

Incomplete clinical, laboratory & followup data
Data mainly from #China, with a high prevalence of #COVID19
CT scanning wasn’t performed for all patients
Heterogeneity of imaging pathways
CT scanning was performed at various time of infection lifecycle

Imaging findings described are similar to common seasonal viral infections (influenza) & non infectious disorders
Reference test ( #PCR) with unknown performances
No cyto-pathological data as reference standard

This thread welcomes @DrLukeOR @RogueRad @drsxr @RadiologyEditor