In the last years, science have been showing a increasement of disease specific questionnaires. How you evaluate this sceanario and which are the positive/negative points of a specific questionnaire?
Advantages The targeted focus of disease-specific instruments can make them clinically relevant. An instrument developed to address a particular disease should be responsive to clinically important changes in health that result from interventions. Disease-specific instruments do not contain any items or health dimensions that are not relevant to the disease. Furthermore, because the instrument has clear relevance to patients with the presenting problem, acceptability is likely to be high.
Disadvantages It is not generally possible to administer disease-specific instruments to samples who do not have the relevant health problem. This means that health status scores cannot be compared with those for the general population, which is a common approach for assessing the impact of a particular disease on health status. It follows that it is not possible to make comparisons across treatments for different diseases, which limits the application of disease-specific instruments in economic evaluation. Finally, the restricted focus of disease-specific instruments may prevent them from detecting side effects or unforseen effects of treatment.
(http://phi.uhce.ox.ac.uk/inst_types.php )
Positively,it is highly focussed and more cost effective. Negatively, it is highly selective that it can miss out vital data from other related diseases.
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