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Table 2 Variabel codings

From: General practitioners' reasoning when considering the diagnosis heart failure: a think-aloud study

Information as presented in the case vignette

Content

Value

"Shortness of breath on level"

Dyspnoea

Positive (presence of finding)

"Pathological R-progression on ECG"

ECG

Positive (pathology)

"He has not had swollen legs"

Oedema

Negative (absence of finding)

"Regular rhythm"

Rhythm

Negative (normality)

"Relative heart volume 630 ml/m2"

Heart volume

630 (numeric values as presented in the text)

  1. Examples of coding of variables in the case vignettes. Positive value = precense of finding, or pathological finding, negative value = absence of finding, or normal finding.