Clinical judgement, the keystone of medical expertise, is a hot topic. By c
ontrast, patient judgement, also of central importance in health care, rece
ives little attention. Patients have the last say concerning whether or not
they seek medical treatment for symptoms, follow a doctor's advice or acce
pt reassurance. Delay in seeking help for serious symptoms, non-compliance
with treatment advice and failure of doctors to reassure many of the 'worri
ed well' have long been recognized as serious problems. We argue that what
is common to these important problems is patient judgement. Surveys yieldin
g information about the average influence of a large number of individual v
ariables do not do justice to the complex interaction of influences that ca
n influence the judgements of an individual person under particular social
circumstances. This is what explains the wide variety of patient reactions.
From the medical standpoint, such unpredictable patient behaviour seems ir
rational. The patient perspective on the meaning of their actions is a hiat
us in our knowledge, which is hampering the planning of effective intervent
ions. Too few studies have sought the perspective of patients by asking the
m why they acted as they did. Thus, the wide spectrum of patient response i
n these situations in relation to personality, life experience and social c
ontext cannot be studied without interpretive field studies that include in
terview of patients with qualitative interpretation.