Table 1 Vignette variables and response options

Age (years)

50, 60, 70, 80

Gender

Male, female

Smoking status

Current lifelong smoker

Quit smoking 5 years ago

Smoked for about 10 years in their youth

Never smoked

Symptoms

Cough and shortness of breath

Haemoptysis

Unintentional weight loss

No respiratory symptoms – incidental finding on CT coronary angiogram

Lung nodule size (mm)

4, 5, 7, 9, 12, 19, 25, 30

Lung nodule location

Upper lobe, not upper lobe

Lung nodule spiculation

Yes, no

Recommendation from reporting radiologist

No recommendation

Specialist respiratory review

Urgent specialist respiratory review

Repeat CT chest as per existing guidelines, probably in 3-6 months