Table 1

The Eight Key Variables Included in the Scenarios and their Levels

Variable

Levels 1

2

3


1. Orthopnoea

No

Yes


2. Pitting oedema

None

Mild, around ankles

Marked, above knees


3. Ischaemic heart disease

No

Yes


4. Heart rate

60-100

< 60

> 100


5. Lung signs

No crackles

Crackles


6. Chest x-ray (lungs)

Normal

Upper lobe veins enlarged

Alveolar oedema


7. Heart size

Normal

Enlarged


8. Electrocardiogram

Normal

Bundle Branch Block

"Ischaemic"


Key: Scale 1-3 where 1 = normal, and 2 and 3 represent increasing abnormality

Hancock et al. BMC Research Notes 2012 5:139   doi:10.1186/1756-0500-5-139

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