Table 1

Observer demographics (n=112) for the first stage of the study (see Methods section)

Observer groupn=112
Thoracic radiologist (n=91)
 >20 years experience22 (19.6%)
 10–20 years experience27 (24.1%)
 <10 years experience42 (37.5%)
General radiologist (n=16)
 >20 years experience4 (3.5%)
 10–20 years experience3 (2.7%)
 <10 years experience9 (8.0%)
Thoracic imaging fellow (n=5)
 1 year experience5 (4.4%)